Rest position

[sbonaime]

With Power Tab Editor 2.0.21 (v2.0.22-0-g13cab27) on macos and at least two staff, the rest symbol is not align with the tabs.

[sbonaime]

same with one staff

Without rest :

With a rest :

[sbonaime]

Maybe there is the same problem with Tremolo Picking symbol

This is the position of this symbol with 2.0.22-0-g13cab27 version
with in systemrenderer.cpp
centerHorizontally(*line, 0, layout.getPositionSpacing() * 1.25);

by changing 1.25 to 1
centerHorizontally(*line, 0, layout.getPositionSpacing() * 1);
maybe the symbol is too much on the left.

maybe 1.125 is the right value
centerHorizontally(*line, 0, layout.getPositionSpacing() * 1.125);