Merging Layers

[Nityanand5EF7]

I am not able to Merge layer 5 and 4. Why layer 5 is showing underlined ? 

[c.pfaffenbichler]

Have you tried releasing the Clipping Masked Layers above it? 

[PECourtejoie]

Hi, more info here: https://www.photoshopessentials.com/basics/clipping-masks-essentials/

or here: https://helpx.adobe.com/photoshop/using/revealing-layers-clipping-masks.html