Requirements:
- Adobe PhotoShop
- Layers to merge
1. Lock all the layers you want to merge together like shown below:

2. Go to Layers>> Merge Linked or press CTRL+E
3. Then there you go, you merged lots of layers together
1. Lock all the layers you want to merge together like shown below:

2. Go to Layers>> Merge Linked or press CTRL+E
3. Then there you go, you merged lots of layers together