Watermark Presets - So many choices.

Question

I've created a watermark as a psd file.
I'd like to make it a universal export so it will appear on my image.
When I export, it shows up as extremely small.
At one point I had it showing in the proper size, and I've chosen Presets-> Image Export -> Show Watermark ->Scale Automatically.
I created a Custom Preset because there are so many choices, most of which I have no idea what select.
I've selected JPEG (Original Size).
Should I have selected PSD (16-Bit) or 50% of Original Size.
Too many choices, too confusing, Help on Aperture doesn't help so I'm posting in this community where I usually get a quick helpful answer.
Thanks !

Answer 1

Here's what I did  .
Design your basic watermark as a PSD.  Scale it to the widths you commonly use (my watermark runs along the bottom, so width works for me), and save a file at each width.  I selected 600, 1200, 1900 px, and saved my files as "KirbyKriegerApertureWatermark600pxWide", etc.
That gives me three watermarks to select from.  As long as the pixel dimensions of the file being created by exporting are close, the watermark will look OK.  I generally export at close to 600, close to 1200, and close to 1900 px.  For each of these I have set two export presets, one with no watermark, and one with.  I named these Export Presets "Kirby JPG 600 Q8 NoWater", "Kirby 600 Q8 Wtrmk", etc.  (The Q# is the JPG quality setting.)  I leave "Scale Automatically" checked, but since the watermarks are selected to match the export size, this does little.
So I have six Export Presets, all JPG, in three different sizes, and for each size with and without my watermark.
Test them all!  If you are not getting the result you want, redesign the watermark.
Vary to suit.
I have never needed to export a full-size copy with a watermark (full-size is for printing; I don't print watermarks).
Ask more as needed.