Topology Question

So say I want to add an edge loop right here.

I thought my topology was fairy concise, but when I try to add an edge loop it wants to draw it this way.

What am I doing wrong and how can I fix this?

Or like so…

Okay, but how do I tell blender to draw the new loop cut that way? Is there a certain key or command I have to enter?

Just delete the upper right face so your cuts terminate there, make two cuts, then fill the area you deleted manually.

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To follow on @Modron 's suggestion here is a way to tame that loop cut. I don’t have your blend but I think this grid shows the basic problem.

  1. The target cut
  2. Delete the faces at the corner of the desired cut
  3. Select opposing vertices, key-F to connect then subdivide once while the line is selected.
  4. Face-fill each section
  5. Loop cut
  6. Select vertices, use key-GG to move them along the diagonal.

This can be further cleaned up by selecting the 2 diagonal edges and dissolving them.

final

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