Hi xzhx.,

1) Kindly refer to the attached Image to enable the edit with Elementor options.

Please have a look: https://prnt.sc/I0v_ASf3BdPh

2) Kindly refer to the attached documentation to edit the LMS plugin.

Refer: https://themessupport.com/documentation/plugin/lmsprodoc/

If still facing any issues, Please mail us your site (WP &FTP ) credentials So that, we can check and have a clear look from our end.

Please refer : https://prnt.sc/oOZUKM_CSXOH

Thank you!