Rotate

5min

Manipulating the input mesh with Translate﻿, Rotate﻿, or Scale﻿ may be helpful with some features to the get the result you want.
Rotate Workflow
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Select Input mesh
Input rotation - Option 1
Manual rotation - Option 2
Click and drag X-Y-Z rings
Snap to Grid - Option 3
Click [Shift+S] to activate Snap to Grid
Click the surface to orient downwards
Close window when done
Hide the original rotation if desired
Example Use Cases
Pattern
The orientation of your model will influence how the lattice pattern generates in the design space. Adjusting the orientation of your part is a tool you have to influence the aesthetics of your lattice.
This example uses a Voronoi lattice type. 
Note how Voronoi's secondary pattern is more prominent in the Y rotation in this geometry.
(No other surface controls were used in this example.)
No Rotation
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Y Rotation
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Base
The orientation of the part matters when using the Apply Base﻿ feature.
Ensure that the surface of your model that you want on the platform is oriented with that surface "down" in the XY world plane.
 
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Remesh

Scale