Adobe Photoshop 7 Filter -

In version 7.0, filters are primarily accessed through the menu at the top of the workspace. To apply an effect: Select the layer you wish to modify in the Layers palette.

to apply the changes directly to the pixels of that layer. Core Filter Categories Adobe Photoshop 7 Filter

and choose a category (e.g., Blur, Distort, Artistic). In version 7