[Feature Request] Add printable margin settings to regmark render

[mofosyne]

Found myself wanting extra space in an A4 sheet and also found out that my printer can print up to 4mm on each side, but the typical regmark is 10mm.

Would be ideal to adjust the safearea to also take this into account as it's clear we can extend the safe area beyond each edge to a certain amount as shown in this screenshot of the official editor.

[mofosyne]

Is there a limit to how far this plugin can cut towards the edge of the page? Seems like it's ignoring paths that goes past the regmark

[EtherGraf]

As far as i know, in the plugin internal is done some clipping (search for clip in the sourcecode), but I know no details.
I assume, the only idea behind it was to keep the machine in its mechanical limits.

[mofosyne]

Unsure but this looks somewhat relevant

• def clip_point(self, x, y, bbox): Clips coords x and y by the 'clip' element of bbox. Returns the clipped x, clipped y, and a flag which is true if no actual clipping took place.

Used by plot_cmds() in ~/git/inkscape-silhouette/silhouette/Graphtec.py:1143