Use the Record Removal step to exclude solids from the scheduling inventory.
You may select individual blocks (left click or <CTRL> + left click) or box select many or the whole level (selected blocks will be shown in yellow).
In this step, the block is flagged for removal (red). When run to next step is selected, the flagged blocks have been removed.
In this step blocks can be completely removed.
In the next step (Preschedule), blocks can be set as 100% mined, however the blocks will remain in the reserves as empty solids.
Use Reserves Shadings and Dumps Shadings fields dropdowns in the Reserves Legend and Dumps Legend tabs, accordingly, to select preconfigured shadings pattern to facilitate Reserves and Dumps view.
More information on the Layers tab use, see here.
Description of the toolbar buttons above the viewport, see /wiki/spaces/212AD/pages/30940470.