Why some tools are disabled?

[Davide Galilei 5]

I want to use Light tool, but it's disabled, why?

[dutchshader 525]

No layer selected ?

[GarryP 1,716]

Some of the filters are not available in 32-bit mode. Can you check the profile of your image?
Select the Pan tool and have a look at the text as highlighted in my attached image, where my image is RGB 8-bit.

Edited October 12, 2019 by GarryP
Forgot to attach the image.

[Davide Galilei 5]

Thanks to the quick answers, I discovered that I had to select a layer

[dutchshader 525]

4 minutes ago, GarryP said:

Some of the filters are not available in 32-bit mode. Can you check the profile of your image?
Select the Pan tool and have a look at the text as highlighted in my attached image, where my image is RGB 8-bit.

Attached image?

Never mind

 

[GarryP 1,716]

Oops. Fixed.

[GarryP 1,716]

Davide, another thing worth checking for – which I still keep doing more often than I’d like – is to assume that you are working on a ‘normal’ layer rather than a mask layer. It’s so easy to have the wrong thing selected and wonder why nothing is happening.

[Davide Galilei 5]

I was working on a selection, i'm new with affinity photo ad I'm learning how to use it... 

Thanks for the answer

[GarryP 1,716]

You’re welcome.
Just one last thing on a similar issue to the filters not being available, I think I remember hearing in one of the official tutorial videos that some filters are sometimes not available under certain conditions but I can’t remember what those conditions were. The official videos are very informative so they are well worth watching anyway if you get a few minutes here and there.

[Davide Galilei 5]

Ok, thanks