To "draw in" a guide in creative software like Procreate , you typically use built-in "Drawing Guide" tools to create a framework—such as a grid or perspective lines—that your strokes can snap to for precision. How to Create Drawing Guides (Procreate Example)
: For your lines to physically "snap" to these guides, tap your current layer in the Layers panel and select Drawing Assist . Manual Guide Techniques
: Draw a horizon line and mark one or two dots. Use a ruler to lightly draw "receding" lines toward those dots to create a perspective cage.
: Open your project and tap the Actions (wrench icon) > Canvas .
If you are drawing by hand or using software without a snap feature:
: Draw basic circles or squares lightly first to act as a "guide" for the final character or object's proportions.
: Switch on Drawing Guide to see the default grid.