Use the Text & Fonts tab of the Modify DWG/DXF Export Setup dialog to map Revit text fonts to specific DWG/DXF text fonts.
Click File tab ExportOptions (Export Setups DWG/DXF). Select the setup to modify. Click the Text & Fonts tab.
Use this setting to specify the degree of visual fidelity to maintain upon export.
From the drop-down list, select one of the following options:
By default, each Revit font listed in the mapping table has a value of {Automatically map font} in the Text Fonts in DWG column. As a result, the Revit font is maintained in the exported file.
To map a Revit font to a specific DWG text font, click the value for that font in the Text Fonts in DWG column, and select the desired font from the drop-down list.
To change all the values in the table back to {Automatically map font}, click Reset All.