Good morning
I have had issues with the morning sun waking me up at 4.30/5 on summer mornings for over 40 years!!!!
I have just come up with something which seems to work!
Using 2 strips of curtain cord down each inside edge of window. Attach cord by drilling 4 holes , 2 top and 2 bottom, but not too close to the frame. Stretch vertically down each side.
2 separate pieces of black out material, one across the top section and one on lower.
I used a chosen material and stitched blackout material to back of it. Can be a little bulky but it works.
Then the curtains can be adjusted to cut out morning sun glare.
It worked this morning 👍
Photo attached … 🤔wont let me