diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index b8c9e71..fcc544a 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -5,7 +5,7 @@ on:
     tags:
       - "v*.*.*"
 
-permissions: 
+permissions:
   contents: write
 
 jobs:
diff --git a/README.md b/README.md
index 1305278..70cb82c 100644
--- a/README.md
+++ b/README.md
@@ -1,11 +1,12 @@
 # The physica module (for physics)
 
 [![CI](https://github.com/Leedehai/typst-physics/actions/workflows/ci.yml/badge.svg)](https://github.com/Leedehai/typst-physics/actions/workflows/ci.yml)
-[![Latest release date](https://img.shields.io/github/release-date/Leedehai/typst-physics)][latest-release]
+[![Latest release](https://img.shields.io/github/v/release/Leedehai/typst-physics.svg?color=gold)][latest-release]
 
-Current semantic version: `0.7`. [Manual](physica-manual.pdf).
+The [manual](physica-manual.pdf).
+Download releases [here](https://github.com/Leedehai/typst-physics/releases/).
 
-Available at [https://typst.app/docs/packages/](https://typst.app/docs/packages/).
+Available at the official collection of [Typst packages](https://typst.app/docs/packages/).
 
 This [Typst](https://typst.app) package provides handy typesetting utilities for
 physics, including:
@@ -37,29 +38,34 @@ See the [manual](physica-manual.pdf) for more details.
 
 See https://github.com/typst/packages.
 
+<p align="center">
+<img src="https://github.com/Leedehai/typst-physics/assets/18319900/f2a3a2bd-3ef7-4383-ab92-9a71affb4e12" width="173" alt="effect">
+</p>
+
 ```
-#import "@preview/physica:0.7.5": *
+// Style 1
+#import "@preview/physica:0.8.0": *
 
-$op("curl")(op("grad") f) = curl (grad f)$
+$ curl (grad f), tensor(T, -mu, +nu), pdv(f,x,y,[1,2]) $
 ```
 
-### Without `typst` package management
+```
+// Style 2
+#import "@preview/physica:0.8.0": curl, grad, tensor, pdv
 
-* To use the `physica` package, simply insert `#import "physica.typ": *` at the
-beginning of your document.
-* To reduce the possibility of name collisions, you may want to import the
-package under name scope `physica`:
-  ```
-  #import "physica.typ"
+$ curl (grad f), tensor(T, -mu, +nu), pdv(f,x,y,[1,2]) $
+```
 
-  $op("curl")(op("grad") f) = physica.curl (physica.grad f)$
-  ```
-* You may also import names specifically:
-  ```
-  #import "physica.typ": curl, grad
+```
+// Style 3
+#import "@preview/physica:0.8.0"
+
+$ physica.curl (physica.grad f), physica.tensor(T, -mu, +nu), physica.pdv(f,x,y,[1,2]) $
+```
+
+### Without `typst` package management
 
-  $op("curl")(op("grad") f) = curl (grad f)$
-  ```
+Similar to examples above, but import with the undecorated file path like `"physica.typ"`.
 
 ## Manual
 
@@ -70,7 +76,7 @@ CLI Version:
 
 ```sh
 $ typst --version
-typst 0.6.0 (2dfd44fe)
+typst 0.8.0 (360cc9b9)
 ```
 
 To regenerate the manual, use command
@@ -97,4 +103,3 @@ testing by comparing rendered pictures with golden images.
 * Docs: the [Creative Commons BY-ND 4.0 license](https://creativecommons.org/licenses/by-nd/4.0/).
 
 [latest-release]: https://github.com/Leedehai/typst-physics/releases/latest "The latest release"
-[latest-manual]: https://github.com/Leedehai/typst-physics/releases/latest/download/physica-manual.pdf "Download the latest manual"
diff --git a/physica-manual.pdf b/physica-manual.pdf
index fbef760..145f032 100644
Binary files a/physica-manual.pdf and b/physica-manual.pdf differ
diff --git a/physica-manual.typ b/physica-manual.typ
index 9a28df5..c125729 100644
--- a/physica-manual.typ
+++ b/physica-manual.typ
@@ -1,7 +1,7 @@
 // Copyright 2023 Leedehai
 // This document is shared under the Creative Commons BY-ND 4.0 license.
 
-#let version = "0.7.5"
+#let version = "0.8.0"
 
 #set page(
   numbering: "1/1",
@@ -22,8 +22,8 @@
 ]
 
 #align(center)[
-  Version #version, July 30, 2023 \
-  Doc updated: July 30, 2023
+  Version #version, September 12, 2023 \
+  Doc updated: September 12, 2023
 ]
 
 #set par(justify: true)
@@ -52,18 +52,20 @@ This manual itself was generated using the Typst CLI and the `physica` package,
 
 With `typst`'s #linkurl("package management", "https://github.com/typst/packages"):
 
+#import "physica.typ": *
+
 ```
-#import "@preview/physica:0.7.5": *
+#import "@preview/physica:0.8.0": *
 
-$op("curl")(op("grad") f) = curl (grad f)$
+$ curl (grad f), tensor(T, -mu, +nu), pdv(f,x,y,[1,2]) $
 ```
 
+$ curl (grad f), tensor(T, -mu, +nu), pdv(f,x,y,[1,2]) $
+
 = The symbols
 
 #v(1em)
 
-#import "physica.typ": *
-
 // Put the superscript *before* the symbol, in case there are symbols after it.
 #let builtin(symbol) = [#super(text(fill: blue, "typst "))#symbol]
 
diff --git a/physica.typ b/physica.typ
index 8c181f3..b143927 100644
--- a/physica.typ
+++ b/physica.typ
@@ -10,13 +10,13 @@
 
 // Given a Content generated from lr(), return the array of sub Content objects.
 // Example: "[1,a_1,(1,1),n+1]" => "1", "a_1", "(1,1)", "n+1"
-#let __extract_array_contents(content) = {
-  assert(type(content) == "content", message: "expecting a content type input")
-  if content.func() != math.lr { return none }
+#let __extract_array_contents(input) = {
+  assert(type(input) == content, message: "expecting a content type input")
+  if input.func() != math.lr { return none }
   // A Content object made by lr() definitely has a "body" field, and a
   // "children" field underneath it. It holds an array of Content objects,
   // starting with a Content holding "(" and ending with a Content holding ")".
-  let children = content.at("body").at("children")
+  let children = input.at("body").at("children")
 
   let result_elements = ()  // array of Content objects
 
@@ -45,7 +45,7 @@
 
 // A bare-minimum-effort symbolic addition.
 #let __bare_minimum_effort_symbolic_add(elements) = {
-  assert(type(elements) == "array", message: "expecting an array of content")
+  assert(type(elements) == array, message: "expecting an array of content")
   let operands = ()  // array
   for e in elements {
     if not e.has("children") {
@@ -161,7 +161,7 @@
   } else {
     math.italic(e)
   }
-  if type(a) == "content" and a.func() == math.attach {
+  if type(a) == content and a.func() == math.attach {
     math.attach(
       math.accent(maybe_bold(a.base), accent),
       t: if a.has("t") { maybe_bold(a.t) } else { none },
@@ -246,7 +246,7 @@
 
 #let identitymatrix(order, delim:"(", fill:none) = {
   let order_num = 1
-  if type(order) == "content" and __content_holds_number(order) {
+  if type(order) == content and __content_holds_number(order) {
     order_num = int(order.text)
   } else {
     panic("the order shall be an integer, e.g. 2")
@@ -259,7 +259,7 @@
 
 #let zeromatrix(order, delim:"(") = {
   let order_num = 1
-  if type(order) == "content" and __content_holds_number(order) {
+  if type(order) == content and __content_holds_number(order) {
     order_num = int(order.text)
   } else {
     panic("the order shall be an integer, e.g. 2")
@@ -271,8 +271,8 @@
 #let zmat = zeromatrix
 
 #let jacobianmatrix(fs, xs, delim:"(") = {
-  assert(type(fs) == "array", message: "expecting an array of function names")
-  assert(type(xs) == "array", message: "expecting an array of variable names")
+  assert(type(fs) == array, message: "expecting an array of function names")
+  assert(type(xs) == array, message: "expecting an array of variable names")
   let arrays = ()  // array of arrays
   for f in fs {
     arrays.push(xs.map((x) => math.frac($diff#f$, $diff#x$)))
@@ -282,10 +282,10 @@
 #let jmat = jacobianmatrix
 
 #let hessianmatrix(fs, xs, delim:"(") = {
-  assert(type(fs) == "array", message: "expecting a one-element array")
+  assert(type(fs) == array, message: "expecting a one-element array")
   assert(fs.len() == 1, message: "expecting only one function name")
   let f = fs.at(0)
-  assert(type(xs) == "array", message: "expecting an array of variable names")
+  assert(type(xs) == array, message: "expecting an array of variable names")
   let row_arrays = ()  // array of arrays
   let order = xs.len()
   for r in range(order) {
@@ -306,19 +306,19 @@
 
 #let xmatrix(m, n, func, delim:"(") = {
   let rows = none
-  if type(m) == "content" and __content_holds_number(m) {
+  if type(m) == content and __content_holds_number(m) {
     rows = int(m.text)
   } else {
     panic("the first argument shall be an integer, e.g. 2")
   }
   let cols = none
-  if type(n) == "content" and __content_holds_number(m) {
+  if type(n) == content and __content_holds_number(m) {
     cols = int(n.text)
   } else {
     panic("the second argument shall be an integer, e.g. 2")
   }
   assert(
-    type(func) == "function",
+    type(func) == function,
     message: "func shall be a function (did you forget to add a preceding '#' before the function name)?"
   )
   let row_arrays = ()  // array of arrays
@@ -349,7 +349,7 @@
   let ket = args.at(1, default: bra)
 
   let height = measure($ bra ket $, styles).height;
-  let phantom = box(height: height, width: 0pt, inset: 0pt, stroke: none);
+  let phantom = box(height: height * 0.8, width: 0pt, inset: 0pt, stroke: none);
   $ lr(angle.l bra lr(|phantom#h(0pt)) ket angle.r) $
 })
 
@@ -363,8 +363,8 @@
   let ket = args.at(1, default: bra)
 
   let height = measure($ bra ket $, styles).height;
-  let phantom = box(height: height, width: 0pt, inset: 0pt, stroke: none);
-  $ lr(|bra#h(0pt)phantom angle.r)lr(angle.l phantom#h(0pt)ket|) $
+  let phantom = box(height: height * 0.8, width: 0pt, inset: 0pt, stroke: none);
+  $ lr(bar.v bra#h(0pt)phantom angle.r)lr(angle.l phantom#h(0pt)ket bar.v) $
 })
 
 #let innerproduct = braket
@@ -376,8 +376,8 @@
 // we use the same hack as braket().
 #let matrixelement(n, M, m) = style(styles => {
   let height = measure($ #n #M #m $, styles).height;
-  let phantom = box(height: height, width: 0pt, inset: 0pt, stroke: none);
-  $ lr(angle.l #n |#M#h(0pt)phantom| #m angle.r) $
+  let phantom = box(height: height * 0.8, width: 0pt, inset: 0pt, stroke: none);
+  $ lr(angle.l #n lr(|#M#h(0pt)phantom|) #m angle.r) $
 })
 
 #let mel = matrixelement
@@ -439,7 +439,7 @@
   let var_num = args.len()
   let default_order = [1]  // a Content holding "1"
   let last = args.at(args.len() - 1)
-  if type(last) == "content" {
+  if type(last) == content {
     if last.func() == math.lr and last.at("body").at("children").at(0) == [\[] {
       var_num -= 1
       orders = __extract_array_contents(last)  // array
@@ -448,7 +448,7 @@
       default_order = last  // treat as a single element
       orders.push(default_order)
     }
-  } else if type(last) == "integer" {
+  } else if type(last) == int {
     var_num -= 1
     default_order = [#last]  // make it a Content
     orders.push(default_order)
@@ -485,7 +485,7 @@
 
 #let __combine_var_order(var, order) = {
   let naive_result = math.attach(var, t: order)
-  if type(var) != "content" or var.func() != math.attach {
+  if type(var) != content or var.func() != math.attach {
     return naive_result
   }
 
@@ -545,7 +545,7 @@
 
   // The last argument might be the order numbers, let's check.
   let last = args.at(args.len() - 1)
-  if type(last) == "content" {
+  if type(last) == content {
     if last.func() == math.lr and last.at("body").at("children").at(0) == [\[] {
       var_num -= 1
       orders = __extract_array_contents(last)  // array
@@ -554,7 +554,7 @@
       default_order = last
       orders.push(default_order)
     }
-  } else if type(last) == "integer" {
+  } else if type(last) == int {
     var_num -= 1
     default_order = [#last]  // make it a Content
     orders.push(default_order)
@@ -642,7 +642,7 @@
     } else {
       ([+], sym.square)
     }
-    assert(type(tuple) == "array", message: "shall be array")
+    assert(type(tuple) == array, message: "shall be array")
 
     let pos = tuple.at(0)
     let symbol = if tuple.len() >= 2 {
@@ -737,12 +737,12 @@
   }
 }
 
-#let signals(str, step: 1em, color: black) = {
-  assert(type(str) == "string", message: "input needs to be a string")
+#let signals(input, step: 1em, color: black) = {
+  assert(type(input) == str, message: "input needs to be a string")
 
   let elements = ()  // array
   let previous = " "
-  for e in str {
+  for e in input {
     if e == " " { continue; }
     if e == "." {
       elements.push(__signal_element(previous, step, color))
diff --git a/typst.toml b/typst.toml
index aa5662d..7d394f7 100644
--- a/typst.toml
+++ b/typst.toml
@@ -1,9 +1,9 @@
 [package]
 name = "physica"
-version = "0.7.5"
+version = "0.8.0"
 entrypoint = "physica.typ"
 license = "MIT"
-description = "Physics: derivative, differential, field, matrix, braket, tensor, etc."
+description = "Physics: derivative, differential, field, matrix, braket, tensor, hbar, etc."
 authors = ["Leedehai"]
 repository = "https://github.com/Leedehai/typst-physics"
 keywords = [
@@ -12,4 +12,5 @@ keywords = [
   "differential", "derivative", "partial", "dv", "odv", "pdv", "Planck", "hbar",
   "tensor", "isotope", "signal", "electromagnetism", "mechanics", "quantum",
 ]
+compiler = "0.8.0"
 exclude = ["*.pdf", "*.py"]