Adding creative frames requires you to know how to work withpathsandfilters.

If theBrush Settingspalette isn’t visible, selectWindow>Brush parameters.

Select theRectangular Marquee tooland draw a rectangle.

Photoshop brush settings

pick the menu icon in the top-right corner of thePathspalette, then chooseMake Work Path.

If thePathspalette isn’t visible, selectWindows>Pathsto open it.

Set theToleranceto0.5 pixelsand selectOK.

Rectangular marquee tool in Photoshop

Right punch theWork Pathin thePathspalette and selectStroke Path.

Set theTooltoBrush, then selectOK.

SelectFilter>Distort>Wave.

Make work path in Photoshop

Move theWavelengthandAmplitudesliders to make the straight edges wavy.

When you are satisfied with the preview, selectOK.

Setting tolerance for work path

Stroke path

Set stroke path to brush

Select Filter > Distort > Wave.

Wavelength and Amplitude sliders

A wavy border frame made in Photoshop CC