docs: update README

README.md

@@ -31,42 +31,74 @@ This will save the executable to the working directory.
 ## Usage
 
 To open a file, run `tresor <file>`. Alternatively, run just `tresor` and input the filename when prompted.
+After entering your password, the KeePass database should open.
 
-After inputting your password, the KeePass database should open.
-Navigate using the `h`, `j`, `k` and `l` keys, type `:q` and hit <kbd>Enter</kbd> to exit.
+Navigate using the `h`, `j`, `k` and `l` keys, type `:q` and hit `Enter` to exit.
+
+### Key bindings
+
+**Quick reference:**
+
+| Key       | Action                                                  |
+| --------- | ------------------------------------------------------- |
+| `j` / `k` | Go up / down                                            |
+| `h`       | Leave group or entry                                    |
+| `l`       | Enter focused group or entry                            |
+| `y`       | Copy password of focused entry or field value           |
+| `d`       | Delete focused field value                              |
+| `u`       | Undo last change                                        |
+| `C-r`     | Redo change                                             |
+| `c`       | Change title of focused entry or value of focused field |
 
 When hovering over an entry, press `y` to copy its password to the system clipboard.
-After focusing an entry with `h` or <kbd>Enter</kbd>, you can select and copy specific fields (again using `y`).
+After focusing an entry with `h` or `Enter`, you can select individual fields and copy their value (also using `y`).
 For encrypted values, the clipboard will be cleared automatically after ten seconds.
 
-Commands work just like in vim: To execute a command, type `:` followed by the command and press <kbd>Enter</kbd>.
+To delete a field, select it and press `d`. Some fields (i. e. title, username and password) are special: They won't be
+deleted, instead their value will be set to an empty string. This is because KeePass considers these fields 'default
+fields', and they should always be present for any given entry.
+
+Note that deleting entries or groups is not implemented yet.
+
+Entries can be renamed by pressing `c` and entering a new name. As with `y`, you can also change individual fields by
+selecting them and pressing `c`.
+
+To undo any change, press `u`. To redo, press `C-r`.
+
+### Searching
+
+To search through the current group, type `/` (or `?` for backward search) followed by a query, and press `Enter`.
+Cycle through matches using `n` and `N` for the next and last result, respectively.
+
+### Commands
+
+Commands work just like in vim: To execute a command, type `:` followed by the name of the command and optionally some
+arguments; then, press `Enter`.
 These commands are currently available:
 
-| Command     | Action                                                                  |
-| ----------- | ----------------------------------------------------------------------- |
-| `:q`        | Quit without saving                                                     |
-| `:w`        | Save file. Specify path with `:w <file>`                                |
-| `:wq`, `:x` | Save file and quit. Specifying the path works analogous to `:w`         |
-| `:e`        | Reload current file (You will be prompted to enter your password again) |
-| `:e <file>` | Load `<file>` from disk                                                 |
+| Command               | Action                                                                  |
+| --------------------- | ----------------------------------------------------------------------- |
+| `:q`                  | Quit without saving                                                     |
+| `:w`                  | Save file. Specify path with `:w <file>`                                |
+| `:wq`, `:x`           | Save file and quit. Specifying the path works analogous to `:w`         |
+| `:e`                  | Reload current file (You will be prompted to enter your password again) |
+| `:e <file>`           | Load `<file>` from disk                                                 |
+| `:change <new-value>` | Set value of focused entry / field to `<new-value>` (shortcut: `c`)     |
 
 Note that currently, the `:w` command is pretty much useless, since editing entries is not supported, so it's not possible to actually make changes to a file. However, the last selected group is, in fact, stored and remembered when re-opening.
 
-To search through the current group, type `/` (or `?` for backward search), followed by a query, and press <kbd>Enter</kbd>.
-Cycle through matches using `n` and `N`.
-
 ## Roadmap
 
-This project is at a very early stage. Here is the short list of what is possible right now:
+This project is at an early stage. Here is the list of what's possible right now:
 
 - Load and save `.kdbx` files of version 3.1
 - Navigate groups and entries
 - Preview entries
 - Copy passwords to clipboard
+- Editing entries (kind of)
 
 Some features planned for the future are:
 
-- Editing entries
 - Fuzzy-finding
 - Creating new databases
 - Customization via config file (inculding color scheme)