cmd/ctrl + 0 — set 100% canvas zoom scale
cmd/ctrl + shift + E — toggle Export panel
cmd/ctrl + \\ — toggle Preview overlay
T — toggle Texts panel
R/O — toggle Images panel (with Shapes section open if possible)
С — toggle Comments panel
cmd/ctrl + A — select all elements on canvas
alt — modifier: while holding change element size from center (not top left corner as usual)
shift — modifier: while holding constrain element’s proportions while resize (even if it’s off in left sidebar)
1 — set element opacity to 10%
2 — set element opacity to 20%
…
9 — set element opacity to 90%
0 — set element opacity to 100%
cmd/ctrl + [ — send backward (z-index –1)
cmd/ctrl + ] — send forward (z-index +1)
cmd/ctrl + alt + [ — send back (bottom position)