On my M8 (should be the same as a Lumia), open your pictures. Bottom middle button ( circle with checkmarks and lines) is a select button. Click that and then select what ever picture (as many as you want) to email.
On my M8 (should be the same as a Lumia), open your pictures. Bottom middle button ( circle with checkmarks and lines) is a select button. Click that and then select what ever picture (as many as you want) to email.