User Settings: General > Fonts
For the target text display, Across automatically uses the font(s) from the source document in the Target Editor. If characters from a source document cannot be displayed in the same font in the Target Editor, a substitute font can be determined for each font family under Fonts in order to ensure correct display of the target text. Across will substitute the respective font during check-in.
If font substitution (see above) is not desired for certain fonts, e.g. for fonts with special icons and characters, these can be defined under Fonts not to be substituted. In this case, these fonts will not be substituted.
Select a font from the drop-down list or enter the exact name of the font in the input field and click Add.