Not only when something is selected.
e.g. open a file
now you want to copy contents (all) to clipboard.
Edit>Select All
Edit>Copy all (or CTRL-C)
My suggestion is to add more (all?) the editing features to the context menu.
For stepping to the next page I can use either <= or => in the toolbar or pageup/pgdn key.
But it would be nice if there were more 'Edit' features under the context menu as well.
In full screen-mode, 27", rmb is faster than the edit button in the toolbar
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