Typically, font sets are downloaded as zip files and will either be TrueType (.ttf), OpenType (.otf), or PostScript Type 1 (.ps1). Many personal and commercial use fonts can be purchased or freely downloaded (depending on the type of license) from the web. SketchBook supports all system and native fonts normally associated with Windows and OS X, as well as most additional user installed fonts.
For this, check out How to create an alpha channel. Depending on the project you’re working on, you may need to create individual text files with alpha channels to use elsewhere. In the Layer Editor marking menu, use Edit Text Layer to modify them. Use Text to create simple RTF text objects. With the Text tools, add text to any image you like, set the font, color, size, and placement. Use text for comments within an image, in panels for speech bubbles and captions, as commercial messaging, and more. Do we limit the number of pre-installed available fonts? No. SketchBook understands this, so there are an assortment of Text tool. For many projects, text is an integral part of your design.
