TL;DR
Please add (or restore) horizontal snapping in the Shape Tool so near-horizontal strokes become perfectly straight underlines without draw-and-hold.

Problem
In Goodnotes 7.0.6, to get a perfectly straight underline I must use Pen/Highlighter and pause for draw-and-hold on every stroke. This breaks flow when underlining many items per page.

Current behavior
• Pen/Highlighter: can “perfect” a line with draw-and-hold.
• Shape Tool: lacks horizontal snap for quick, hold-free underlines.

Proposal
• Add horizontal snapping in Shape Tool: if the stroke angle is within a tolerance of horizontal (e.g., ±5–10°), snap to 0°/180° automatically.
• Provide a quick toggle on the toolbar (e.g., Underline mode or “Require Hold to Snap”: Off).

Nice-to-have options
• Tolerance slider (e.g., ±3/5/8/10°).
• Shortcuts: double-tap Apple Pencil, or a keyboard shortcut to toggle “Underline mode.”

Impact
• Underlining dozens of terms per slide is common in study sessions; removing the hold reduces hundreds of pauses per session and keeps handwriting flow intact.
• Especially valuable for students/researchers annotating dense PDFs at speed.

Environment
• Goodnotes 7.0.10 (iPad)
• Apple Pencil
• Documents: lecture PDFs with heavy underlining

Thanks for considering this.