Input fields and text windows are edited using built-in Arachne editor. In editor, you can use standard editing keys (cursor keys, <Backspace>, <Delete>, <Home>, <End>, <Page Up>, <Page Down>). <Shift> + cursor keys marks block, and following commands are available:

<Ctrl+X> | Cut to clipboard (*) | Left mouse button | Move/mark block (*) <Ctrl+V> | Paste from clipboard (*) | Middle mouse button | Paste block
<Ctrl+C> | Copy to clipboard (*) | Right mouse button | Copy to clipboard
<Ctrl+Page Up> | Goto top of file (*) | <Ctrl+K> B | Begin block
<Ctrl+Page Down> | Goto end of file (*) | <Ctrl+K> K | End block
<Ctrl+Home> | Page Left | <Ctrl+K> M (V) | Move block
<Ctrl+End> | Page Right | <Ctrl+K> Y | Delete block
<Ctrl+Left> | Previous word | <Ctrl+K> C | Copy block
<Ctrl+Right> | Next word | <Ctrl+K> H | Hide block
<Ctrl+T> | Toggle wordwrap (*) | <F7> (<Ctrl+Q>) | Search for string
<Insert> | Toggle insert/overwrite | <Ctrl+L> | Search next
<F2> | Submit form or save file (*) | <Ctrl+Y> | Delete line
<F3> (<Ctrl+R>) | Insert file (block) (*) | Left doubleclick | Mark line (*)
<Ctrl+W> | Write to file (*) | Unmark block (*)
<Tab> | Goto next input field | Submit URL
<Shift+Tab> | Goto previous input field | Right doubleclick | Delete block (*)
<Enter> | Goto next input field (**)
<Esc> | Exit editor mode

(*) Multi-line windows only (**) Submits form if in last single-line input field in form