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
Export
Options
(Export Setups DWG/DXF). Select the setup to modify. Click the Text & Fonts tab.
(Modify Export Setup) from an export dialog to launch the file specific export setup dialog.
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.