Drag section lines and select them near a line
Drag a section line to resize the two areas it separates, and know that clicks near a line always select the line.
Section lines can be dragged to resize the two areas they separate: the drag adjusts the cut position, growing one section and shrinking its neighbor.
✓ 已于 2026年10月22日 在产品中核实Movement is clamped - a section line cannot be dragged past (or within ~1mm of) the next parallel section line in either direction; it simply stops, it does not swap or delete.
Objects keep their positions relative to their own section's origin, so dragging a line shifts everything in the following sections along with it. An object can be left lying outside a shrunken section; the app does not move it back into the section's bounds. A text left outside its section is no longer shown.
Hit-testing checks section lines FIRST with a ~5-pixel tolerance, before any canvas object.