What do you plan to run this on most often? Do you use a drawing tablet or a mouse for your artwork?
: Use the Ellipse Select Tool YouTube to draw your main bubble area.
: Some newer digital comics adopt vertical scrolling layouts optimized for one-handed viewing on mobile screens. sleepygimp new comic - WebNovel sleepy gimp comics portable
The search query appears to be a result of ambiguous terminology. Below are the likely scenarios explaining the user's intent:
A raw image editor isn't ideal for seamless reading. You need a dedicated comic viewer that reads compressed archives like .cbr (RAR), .cbz (ZIP), or .pdf . What do you plan to run this on most often
Choose a solid line width (e.g., 4px or 6px) to lock down your panel grid. Advanced Bucket Fill for Flatting
: Built-in tools to create classic retro comic book dots or manga screentones. : Some newer digital comics adopt vertical scrolling
The ultimate lightweight option. If your computer is incredibly old or low on resources, Sumatra opens comic archives instantly with a virtually nonexistent memory footprint. How to Optimize Independent Comics for Portable Viewing