The Sketch Text Tool doesn't properly display Unicode or Symbol characters. If I copy a character from the Font Book page on MacOS, for instance, it shows up as a question mark inside a diamond symbol even when I set it to the same font in the dialog. If I type a Unicode character using the key combination, it immediately starts outputting characters rather than pausing until the code is completely entered. Copying a single Unicode character from another program and pasting it into the dialog results in even stranger behavior, for instance:
- U+23FB ⏻ POWER SYMBOL (IEC 60417-5009 stand-by symbol, IEEE 1621 power symbol)
The symbol will show up as a box symbol in the dialog and as a "?" in the model. In other cases, the pasted symbols and their color and font attributes are copied in the dialog but a question mark appears in the model.
Some Unicode characters correctly appear in both the dialog and model such as "→". In other cases, the symbol only appears correctly if the correct font is used. There's one case, however, when the symbol doesn't show up at all such as"⎗", making it impossible to bring up the dialog box to change it unless you undo to a previous state.
This problem stems from using a 2D graphics engine, QT, that uses a least common denominator cross-platform approach. Unfortunately, MacOS doesn't make exposing its API simple.
Fusion
