When you draw 2D duct with the "Auto Hide/Trim" option ON in the vicinity of existing Mech-Q duct, Mech-Q will offer you the option to "hide" the existing duct - indicating overlapping of duct. With the "Show hidden lines" ON, Mech-Q changes the layers of the overlapped (existing) duct to the "hidden" layer
With the "Show hidden lines" OFF, Mech-Q trims entities fron the existing duct as required.
You can turn the "Auto Hide/Trim" feature ON after you select 'Options" in the Mech-Q Straight Duct module
NOTEWhen the BOM data is OFF Mech-Q does not include the BOM data and other information to the ducting objects - without this information the Auto-Hide/Trim feature will not work
You must have the "BOM/List/Dev - Active" - ON before the Auto-Hide/Trim feature can work... The Auto-Hide/Trim feature will work on objects drawn AFTER the "BOM/List/Dev - Active" - was set ON and will not work with duct objects drawn when the "BOM/List/Dev - Active" - was set OFF.
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