Hi,
Saved search buttons are managed in view Launcher of component CRM_SAVEDSEARCH.
You can see in the HTM page how the accessibility of each button is managed.
For the "Advanced" button :
* EDIT BUTTON
IF hideEditButton = abap_false. %>
<thtmlb:button text = "<%= otr(CRM_BSP_UI_FRAME_APPL/ADVANCED) %>"
onClick = "Edit"
enabled = "<%= editenabled %>" />
<%ENDIF. " END EDIT BUTTON
To make the button disappear, you can "play" with the hideEditButton attribute. Set it to 'X', and the button will not appear.
To make the button visible but deactivated, you can "play" with the editenabled attribute. Set it to "FALSE", and the button will be disabled.
Hope this helps.
Best regards,
Sylvain