HELP Dimension tool

Hi guys, I need to change the style of my dimensions for my floor plan but I can’t find the dimension style window. I’ve been reading guides where they mention it but in my version of sketchup I can’t find it anywhere. Can anyone help me please

The Dimension Style window is in LayOut. For dimensions added in SketchUp the settings are under Window>Model Info>Dimensions. If you want to change the units, that will be done in Model Info>Units.