There are multiple methods for aligning models to the grid. The following will show a simple method followed by a more complicated one.

1) Simple Alignment

Often, an object out of alignment can be corrected by opening the „item“ tab on the right-side panel, and looking for the rotation values. We can see here that the values on all three axis are rotated, these can be „zeroed out“.

in other words, select the value to be changed and type 0.