When deciding where to position your curtains and blinds on windows, there are a few factors to consider.

Firstly the practicalities around access to opening and closing windows.

How much sun and light, or a view, do you want allow in.

The proportions of the window need to be considered also.

Do you want to create an illusion of extra height or width?

How high are your ceilings?

How much wall space are you prepared to loose when taking them wider?

Stand back and really look at the situation .
Think about what is going to function well and also look great.
If you don’t trust your judgement, get some expert advice