‘Load from Disk’ and you will see a window like this,
though your mask showing will be different to mine
Click on the image on the left and this will open your masks
menu...scroll down till you find the fanned rectangle and click on it to select

It will appear in the preview. Check the rest of your settings
are set as below, then click 'Load'

You will now see the mask appear like
this.......

and you will notice a ‘Group’ has
appeared in your ‘Layer Palette’ which consists of your background layer and
your mask layer.
To make things a little easier to see,
click on the minus sign at the side of the group it will close the contents
of the group leaving 'Group - Raster1' layer showing

Right click that layer , choose 'Rename' and rename it
‘Mask1’

As the glitter we will be using here has
3 frames, we have to have a ‘Mask’ layer to go with each frame, so 3 x mask
layers in all. We already have 1 x mask layer so we have to duplicate till we
have 3 in total.
[Some glitters have 5 or more frames so
you would have to duplicate your mask layer accordingly]
So, right click ‘Mask1’ and choose ‘Duplicate’,
right click the 'Copy of...' and rename it ‘Mask2’
*
Right click ‘Mask2’ and 'Duplicate',
right click the copy and rename ‘Mask3’
This is what your layer palette should look like now

~~~~
Now for the glitter
Go to ‘Layers’ ‘New Raster
Layer’
Right click the new layer and rename it
‘Glitter1’
Right click 'Glitter1'and
‘Duplicate’,
Right click the copy and
rename ‘Glitter2’
Right click 'Glitter2' and
‘Duplicate’,
Right click the copy and rename
'Glitter3'
These are the layers you should now
have....

Drag the layers so that you have
alternate layers of glitter and mask in this order...
'X' out all the layers except the first
2 [X out by clicking on the little eye at the end of each row]
and click on
'Glitter1' to highlight [activate]

In the 'Materials' ‘Foreground and
Stroke Properties’ box, click on the ‘Pattern’ icon ‘

Click on the pattern which shows there....

and this will open the ‘Material Properties' box.
Click on the pattern showing in the little preview window....

...and this will give you the patterns menu. You will be able
to see your three frames of glitter
*
Take no notice of the numbers beneath each as these will
differ depending on how many images you have open onscreen.
Just count your glitters 123
Now, click on the first of your glitters to select it....
*
and it will appear in the 'Materials Properties' preview
window....'OK' it and it will appear in your 'Materials' palette

With the 'Glitter 1' layer still highlighted in your 'Layer'
palette, select the 'Floodfill Tool'
and click on your canvas to floodfill with
your glitter

Now,‘X’ out those 2 layers in your
palette and ‘un x’ the next two
and click on the ‘Glitter2’ layer to
highlight...

Click on the glitter showing in
your 'Materials' palette [ which you've just used] and the 'Materials
Properties' box will open again.
Click the 'Current Pattern' which will open the menu, and
select the 2nd of your 3 glitter frames....

...'OK' it and it will appear in your 'Materials' palette.
With the 'Glitter2' layer still highlighted in your 'Layer'
palette, click on your image with the 'Floodfill Tool' to floodfill with the
glitter

'X 'out those 2 layers in the 'Layer
Palette and ‘un x’ the last 2, click on 'Glitter3' to highlight

Click again on the glitter
showing in your 'Materials' palette, open the menu and this time select the 3rd
frame of your glitter

Making sure the 'Glitter3' layer is still highlighted in your
'Layer' palette,
Floodfill your layer

Now...'X' out all the layers except the bottom 2 and click on
'Glitter1' to highlight.

Go to 'Layers' 'Merge' 'Merge Visible'. This merges your first
glitter layer and your first mask layer together on the same layer.

‘X’ out that 'Merged' layer and
‘un x’ the next two layers and click on 'Glitter2' to highlight......

...then ‘Layers’ ‘Merge’ ‘Merge Visible’

‘X’ out that 'Merged' layer also
and