A text image works when one idea needs to be understood quickly. Strong structure, comfortable line length, and clear contrast matter more than decorative effects.
Begin with one message
Write the main thought in one or two short paragraphs. Remove repeated setup and move secondary details into a caption outside the image. If the reader has to zoom, the graphic is carrying too much text.
Use plain text or simple Markdown
Plain text is the fastest option. Markdown is useful when you need a heading, emphasis, or a short list, but the hierarchy should stay simple enough to scan in a few seconds.
Build a readable hierarchy
Pick a type style that matches the message, then adjust size and alignment. Leave generous padding around the copy. High contrast between text and background is more reliable than subtle color combinations, especially on small screens.
Review every size you export
A line break that feels balanced in a square may look awkward in a vertical canvas. Switch between 1:1, 4:5, and 9:16 previews, shorten the copy if needed, and confirm that the final text is not clipped before downloading.