Open ETRANSMIT Command: Type ETRANSMIT in the command line and press Enter to open the Create Transmittal dialog box.
Open Transmittal Setup: Click on the Transmittal Setup button to modify the settings.
Modify Transmittal Setup: In the Transmittal Setup dialog box, make sure to select the option Include fonts to ensure SHX files (fonts) are included in the transmittal package.
Save Changes: Click OK to save the settings and then create the transmittal package. This will ensure that all necessary SHX files are included with the drawings sent to the client.
References:
* AutoCAD Help Documentation on ETRANSMIT Command