What changes between minimal dogbone, T-bone and full corner?
For a 90° pocket corner, let R be half the cutter diameter. Minimal dogbone centres the circular relief R away from the vertex along the inward angle bisector. It bulges beyond each nominal wall by R(1 − 1/√2) and consumes √2·R along each adjoining edge.
A T-bone centres the circle R along one adjoining edge. It uses 2R along that edge and none along the other, with a bulge of R beyond one nominal wall. X/Y selects the direction of the centre offset, not the wall that bulges.
Full corner centres the circle on the original vertex. The exported relief wraps around the outside of the corner through 270°. Each adjoining edge gives up R, and the maximum bulge beyond a nominal wall is R.
A concrete 1/4-inch cutter comparison
A 1/4-inch cutter is exactly 6.35 mm in nominal diameter, so R = 3.175 mm. Minimal relief bulges about 0.930 mm past each wall and consumes 4.490 mm along each edge. Full corner bulges 3.175 mm and consumes 3.175 mm per edge. A T-bone consumes 6.350 mm along its selected edge.
These are wall-normal bulges and edge distances, not a single universal measurement along the diagonal. The actual outer size depends on the relief style, enabled corners and T-bone axis; use the generator's relief-inclusive output size.
Which style should I choose?
Start with minimal relief for joinery where a small symmetric opening is acceptable and there is enough edge length. For a show face, inspect a T-bone whose overcut sits on the less visible wall. Auto selects using remaining edge length; verify the chosen orientation in the preview.
Consider full corner when you can accept its larger opening or a short edge cannot spare the length needed by minimal relief. For example, two full corners with a 6.35 mm cutter need more than 6.40 mm of edge; two minimal corners need more than about 9.030 mm. Those figures include this tool's 0.05 mm separation allowance, which is not joint-fit clearance.
Keep the cutter in CAM matched to the cutter used to generate relief. Test a coupon with the actual material and mating tab before committing to a finished part.
Relief and fit clearance solve different problems
Relief makes room for a square tab at the slot's internal corners. It does not widen the straight walls to create assembly clearance. A tab that binds along its whole face needs a size, material-thickness or toolpath check, even if every corner is relieved.
The generator supports a single closed straight-line pocket outline, with relief on eligible 85°–95° corners. It blocks overlapping reliefs. SVG and DXF contain finished geometry; your CAM must still generate a pocket or compensated inside contour.