Lightroom - edit in Photoshop

[andrejraminskij]

Hello,
Could you please explane, why Edit in Adobe Photoshop and others not active?

Thanks.

[99jon]

Does it work if you switch to the Library grid?

[Per Berntsen · Accepted solution]

You are working with a Smart preview, which cannot be sent to to Photoshop for editing.

Make the original available to Lightroom, and Edit in Photoshop will become active.

[andrejraminskij]

Thank you, Original+smart is correct

[Zoe5CB2]

Can someone explain in more detail? What does 'make the original available to Lightroom' mean?  Thanks!