> For the complete documentation index, see [llms.txt](https://docs.songbookplus.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.songbookplus.com/english/readme/notizfunktion/funktionsknopf-notizen.md).
# Function Button Annotations
A very special annotation is the function button annotation.
This allows you to insert a button anywhere in the document and configure it with various actions to be executed when tapped.
Possible functions include sending various MIDI commands, jumping to another page, starting or stopping playback, scrolling, or the metronome, and much more.
Insert function button annotation
Press this button to insert a function button annotation.
Press "Properties" to open the properties window.
Use the "+" to add the desired actions to be executed later when pressing the button.
The function buttons can optionally also have a group number. This is used, for example, to control specific function buttons or one function button after another using a foot pedal based on this group number.
It is also possible to create function buttons that display the value of a specific MIDI controller on a specific MIDI channel. And when you tap the button, a slider appears, allowing you to change the controller value.
To do this, create a normal function button and add "MIDI CC Button" as the only action.
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