File handling
<ctrl>s = save
<ctrl>o = open
<ctrl>w = close document
<shift><ctrl>w = close all documents in current window
Navigation
<ctrl><pageup> = document tab to the left
<ctrl><pageup> = document tab to the right
<ctrl><tab> = previous document tab
<ctrl><tab><tab> = before-previous document tab (etc.)
<ctrl>l = goto line
<ctrl>+ = zoom in (font size bigger)
<ctrl>- = zoom out (font size smaller)
<ctrl>f = search
<ctrl><shift>f = search for currently selected text (select some text and press this key-combo to search for it)
<ctrl>h = advanced search and replace
Editing
<shift><ctrl>b = select current block
<shift><ctrl>bb = select parent block (hold shift and control, press b two times)
<shift><ctrl>bbb = select parent of parent block (etc.)
<ctrl>z = undo
<shift><ctrl>z = redo
<ctrl>d = duplicate line
<ctrl>y = duplicate line
<ctrl><up> = move line up
<ctrl><down> = move line down
<ctrl>. = indent selection / indent current line
<ctrl>, = unindent selection / unindent current line
<shift><ctrl>c = toggle comment