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`python createoverlay.py Z6III --gridline 4x4` \r
Creates a 4x4 gridline with default line and fill characteristics for a Nikon Z6 III.\r
+<br clear="all">\r
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`python createoverlay.py Z6III --frameline 16:9 --frameline 1:1,dashedline=50-50,linecolor=#ff0000` \r
Creates a 16:9 solid-line white frameline and a 1:1 dashed red frameline.\r
+<br clear="all">\r
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## Automatic output filename\r