Select all keyframes in the graph editor

@Vadym B. 

Since Command A has been what's been used for selecting all of the Layer instead of the keyframes for the last several decades, maybe with a modifier key.  Of course, if it's made available as a keyboard shortcut to begin with, it can be anything the user wants to map it to.

It would be logical to do this like in most other programs - cmd+A, but that selects all layers, unfortunately, which is not logical while the graph window is active. Thanks!

Good idea.  I've upvoted it.

That feature could be a great addition to After Effects. Moving your thread to the Ideas section so that others can vote. 

Not already assigned but there is a command the selects all visible keyframes on selected layers or all keyfremas on all layers.

You can assign is by going to Edit > Keyboad Shortcuts.

Search for: Keyframes

Visible Keyframes on Selected Layers

Visible Keyframes on All Layers

The commands are based on working with keyframes label groups but should work for general purposes.