This font contains generic glyphs for all characters, including invalid characters. To avoid that, you could add the last resort font as the bottommost fallback font. If your file contains a character not supported by any font then EditPad uses the main font to display it, which will result in an empty rectangle or a question mark in a rectangle. Add fonts specific to other scripts higher in the list of fallback fonts. So select a font for your file’s main script as the main font. Other characters are displayed by the topmost font in your list of fallback fonts that supports them. EditPad displays all characters supported by the main font using that font. If you select a complex script text layout then EditPad lets you select a main font and as many fallback fonts as you like. If you select a left-to-right only text layout configuration then EditPad lets you select a single font and allows Windows to perform automatic font fallback. You can configure this for the active file via the Options menu or as a default via the file type configuration. In EditPad Pro, the text layout configuration determines whether Windows or EditPad handles font fallback. Word processors work this way as they allow the document to be formatted with as many different fonts as you like. The other way is for the application to select the correct fonts for all the characters that it wants to display. Characters supported by both the original font and the substitute font, such as basic whitespace and punctuation, may sometimes be displayed with one font and sometimes with another depending on the font used for the surrounding characters. Substituted fonts may use different sizing or spacing. Some characters may still be left as empty rectangles. Unfortunately, this often doesn’t work well or at all. Your application asks Windows to display all text with this file while allowing Windows to substitute different fonts for characters that your chosen font doesn’t support. You select one font that works well for most of your file. One way is to rely on automatic font fallback performed by Windows. An application can achieve this in two ways. If your file uses multiple scripts or uses many special symbols then multiple fonts may be needed to display all characters correctly and readably. Hiding fonts you don’t really need makes it easier to pick fonts that you do work with. Fonts that are hidden are still available to applications that specifically request them. Right-click a font and select Show (or Hide) to toggle its visibility. To make a font visible (or invisible) in the font dialog, use Windows Explorer to navigate to the C:\Windows\Fonts folder. You may not be able to select some of the fonts for more obscure scripts in the Options|Font dialog EditPad because Windows is hiding them. Windows 7 and later ship with a wide range of fonts dedicated to specific scripts. A Thai font like Leelawadee, for example, will perfectly display a Thai document with appropriately sized Thai and Latin (English) characters. If your file only uses one script (in addition to basic Latin) or if you’re happy with a universal font, then you can simply select Options|Font in EditPad’s menu and pick a font that works for you. Universal fonts like Arial Unicode MS or Lucida Unicode tend to be bland. For example, monospaced fonts that programmers like only support alphabets that can be displayed nicely in a monospaced fashion. Styles that make a font beautiful or practical usually only work well for specific scripts. This allows the font to be optimized for those scripts. Most fonts only support specific scripts. This often happens when your font does not support one of the scripts and automatic font substitution is picking an inappropriate font. Some scripts like Thai that need more vertical space may look tiny next to English characters. If your file mixes different scripts then some scripts may be perfectly readable while others may look odd or be too hard to read. These rectangles are placeholder symbols that indicate that the font cannot display these characters. With the correct encoding selected, some characters may appear as hollow rectangles or as question marks inside a rectangle. EditPad supports all Unicode encodings and all legacy code pages that still have any relevance. To fix this, select Convert|Text Encoding in the menu, choose the “reinterpret” option, and then select the encoding that makes EditPad display the correct characters. For example, an ASCII file misinterpreted as UTF-16 will show Chinese gibberish. If EditPad displays your file with the wrong characters then you need to change the encoding. For EditPad-or any other editor-to display text correctly it needs to use the correct encoding to know which characters to display and it needs to use a font that can actually display those characters.
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