[Gmsh] Meshing a triangle with a structured mesh

[look]

Dear gmsh list,

I am trying to mesh a triangle using the transfinite algorithm. The attached picture shows what I have achieved so far. One questions on this: How can I specify the corner where the mesh is "concentrating" (In the picture the mesh concentrates in the bottom left corner)?
Thanks in advance for your help! Attached is also the geo file. 

Best regards,

Kate
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