I'm not sure how to ask this question. Basically, I built a part in the right half of my screen, looking at it from the Y perspective (numpad 1). I applied a mirror modifier, across the X axis. I left a gap in the middle so that I could more easily create the part. Now I want to scoot the part along the X axis so that there is no gap in the middle. I know how to move the whole part together, but how can I move it so that the leftmost vertices are exactly stuck together, completely eliminating the gap?
It's annoying that, in Edit Mode, Blender's Snap To : Increment doesn't have a Snap With option, otherwise this would be more intuitive.
In this case, if you have the shipped add-on '3D View: Pie Menus' activated with the 'Origins' option, you can quickly set the origin of your object to the vertices of the desired mirror-plane from Edit Mode, and the mirrored half will jump to the original. Then you can AltG reset the object back to World 0.
But personally, rather than puzzle over each case, for more CAD-like snapping, my habit is to create temporary snap targets.
With snapping nearly always set to To : Vertex and With : Active, and the pivot set to 3D Cursor:
- ShiftDX duplicate a single vertex..
- SX0 scale the vertex to 0
- Select the source vertex, (it will stay active), and L all the connected ones
- GX Move the selected vertices, snapping to the temporary target
- Delete, or merge, the target.
I wouldn't claim this is necessarily the quickest for this case, but the method is quite general. You can leave your pivot and snap settings as they are over most operations, and the sequence goes into muscle-memory.
In edit mode select a vertex to the left of your model press N to see the "Item"->"Transform" panel. Select "Global" and copy values from X field.
Tab out of edit mode and in same panel subtract the copied X value from current object location.
This moves the object to the left by exactly the amount needed to put the vertex you selected at the very beginning on the X = 0.
Sometime it doesn't work perfectly, and slight adjustment at the very end is necessary.