Simplify3D User Forum

Version 5.1
I drop an object on the deck and I see a blue rectangle on the deck that is 3mm thick.
If I try to get it ready for printing, the height only goes up to the height of the rectangle.

How can I clear this?

Advanced tab on the process settings page. Custom height button on the lower left.

For reference, in V5 you can find this setting by clicking the "Custom Zones" button in the lower left of the process settings window, and then disabling the start or stop printing at Z height options.