I want to display results of RF-CONCRETE Surfaces transparently on grid points and there are too big red points on the grid points. Is it possible to specify the size of these red grid points?
Yes, it is possible. For this, open the Display Properties window (in shortcut menu: right-click the RFEM graphic window) and select "Colors" -> "Other" -> "Text Bubbles". In the setting option of text bubbles, you can find the "Line thickness", which is set to "3" by default. In order to display the red grid points in smaller size, set the thickness to "1" or "2".