2. In the pop-up options dialog box, switch to open the save bar, and then click the arrow to find the security option;
3. In the pop-up "Security Options", in the "Password" column, enter the password to be set for the graphic file;
4. When the password setting completion point is confirmed, you will be prompted to enter the password again; (The password set at this time should be the same as that set in the fourth step);
5. After returning to the main options menu, click OK. If you click Save at this time, a dialog box will be displayed. Please remember to save the version indicated above before the password takes effect;
Design skills:
Before setting passwords for drawings, you must make a password setting table to distinguish the opening passwords between drawings, otherwise you may forget the passwords and the drawings will never be opened.