Newbie in rhino

Hello, Im new into rhino and find it difficult to do some basic stuff. The problem is that the point, which is rounded with black ink in a screenshot. I want to make that point in a lower level according to y axis. In other words i want to make these all triangles to be not horizontal but to make rounded point lower than other points. If there are any issues in understanding my text feel free to ask it, appreciate your help.

Hello- you can try SolidPtOn and move the ones that show up at that location down - might or might not do a clean job of it. Otherwise post a file with your objects.