importing textures to use with layers

[imagineer@morningside]

Good Day:

I am a new user of Affinity Photo. 

I use a lot of texture overlays in layers (which are installed in ON1 photo suite) but believe that Affinity can provide me more flexibility. 

My question is how to import these textures from my downloads - The majority of textures are imported from Photomorphis.com  - and how can I  use them as overlays (multiple textures layered) using Affinity layers on photos imported from LR 6 (no CC program).  I have added Affinity  as an external editor in LR and would appreciate any suggestions of how to make Affinity as my key editor for my work. 

I also use Topaz and NIK programs for editing and how can I incorporate these programs with Affinity ?

If you have videos, etc. to show how this is done would also be appreciated 

Thanking you for your considerations and education.

Cheers........John O    imagineer@morningside

[R C-R]

You can use the File menu > Place command or drag & drop to add layers in any supported format like png, jpeg, or tiff. Compatible Photoshop plugins can be added via the Preferences > Photoshop Plugins panel. Search the forum on "NIK" for the specifics of how to add them -- the procedure is slightly different depending on if you are using a Mac or a PC.