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Mouse Reference

Mouse Usage in a Layout Box

Button Event Behaviour
Left Single click Make the window slightly larger
Left Drag vertically Change the height of the window if there are other windows in the column
Left Drag horizontally Move the window to another column
Right Single click Minimize other windows
Middle Single click Hide other windows

Mouse Usage in a Scrollbar

Button Event Behaviour
Left Single click Scroll upwards. The amount scrolled is relative to the vertical position of the click within the scrollbar. Near the bottom scrolls an entire page, while near the top scolls a line.
Right Single click Scroll downwards
Middle Drag vertically Scroll to that relative position in the file

Mouse usage in a Window Body or Tag


Button Event Behaviour
Left Single click Set cursor position and remove other cursors and selections
Left Alt + Single click Create an additional cursor
Left Double click Select the string of alphanumeric characters under the mouse
Left Triple click Select the space-separated word under the mouse
Left Quad click Select the current line
Left Double click on the first character of a line Select current line
Left Double click on a delimiting character¹ select text enclosed by the brackets, excluding the brackets²
Left Triple click on a delimiting character¹ select text enclosed by the brackets, including the brackets²
Left Drag Select text and remove other selections
Left Alt + Drag Create an additional selection
Right Single click Search for word or selection under cursor and make a new selection. If word or selection is surrounded by / then it is treated as a regular expression.
Right Alt + Single click Acquire the word or selection under the cursor³
Right Alt + Ctrl + Single click Like Alt + Single click, but if a new window would be opened for a path, instead load the path in the current window
Middle Single click Execute the word or selection under the mouse. This can be an Anvil command (New, Del, Paste, etc) or a shell command
Middle Select and release Execute the selected command

[1] A delimiting character refers to an opening or closing bracket, or an opening or closing quote character. Explicitly, one of {, [, (, < or its matching closer, or one of ", , or .

[2] For quotes, if it is ambiguous where the matching quote character would be because there is a candidate match both to the left and the right, then no action is taken.

[3] Acquire means the following. First, if the word or selection matches a plumbing rule, execute that plumbing rule. If there is no matching plumbing rule, then if the word or selection is a file or directory path and there is already a window open with that path as the filename portion of it's tag, change focus to that window and make it visible. If there is not already a window open for that path, open one. Finally, if a plumbing rule is not executed and the path ends in :N, #C or !X then go to line N, character C or regex X in the file.


Chorded mouse usage refers to clicking and holding one mouse button, and then while that button is held, clicking and releasing another button or keyboard key. In the table below, "Primary Button" refers to the first button that must be pressed and held, and "Secondary Button / Key" refers to the next button or keyboard key that must be pressed and released.

Primary Button Secondary Button / Key Behaviour
Left Middle Cut selected text to clipboard
Left Right Paste text from clipboard
Middle Left Execute command with the text of the last created selection in a window body as the first argument
Left F1-F12 Create a mark at primary cursor position who's name is the function key.