Argthtjtr

There's an excellent post on customising Okular to modify highlight tool properties at
Customise Okular to modify highlight tool properties
It's helpful but it deals with modifying an existing tool feature. I want to add my own annotation "Stamps" so that with a click or two I can place them on a PDF document. I suspect it involves modifying the tool.xml file and adding .png files of the "stamps" to a folder. More specific guidance would be appreciated.

I followed up @bengan's recipe, but copying to the ~/.kde4 location didn't work. Only when I copied my file under /usr/share/okular/pics/, it did show up inside Okular, but it still won't print out.

Since Okular 0.24 it's possible to define your own stamps.

1. You create your own stamp and save it as png or svg. (Ex. picture.png)


2. Copy it to ~/.kde4/share/icons/ (or .kde whichever is used)


3. In Okular you go to Settings->Configure Okular->Annotations


4. Click on "Add". Chose Type "Stamp"


5. Give it a name in "Name:"


6. In the box "Stamp Symbol" enter your own file. (Ex. picture.png)

In the Okular docs page there is explained the mothod to add a custom stamp:

1. Create the icon you want to use for your own stamp and save it in any graphics format supported by Okular


2. Click the Add button, select type Stamp and enter a name for your stamp.


3. Enter the full path to your custom icon into the dropdown box in the Stamp Symbol group

It took me a while to figure this out. I had to use strace and discovered ocular looks for the lower case of the filename you enter manually, rather than the actual case you enter. (my file had upper cases in it.)

So adjusting the post from @bengan for Ubuntu 16.04, Okular 0.24.2 -

1. Create your own stamp and save it as png or svg, making sure it is all lower case. (Ex. picture.png)


2. Copy it to ~/.kde/share/apps/okular/pics/ (or .kde4 whichever is used)


3. In Okular you go to Settings->Configure Okular->Annotations
   


4. Click on "Add". Chose Type "Stamp"


5. Give it a name in "Name:"


6. In the box "Stamp Symbol" enter your own file. (Ex. picture.png) The path should not be necessary and the actual picture should show up when you get it right. (it searches for it as you type)

Actually, all the answers here are partially correct. Here is the rest.

• The path for me was ~/.local/share/apps/okular/pics/
  


• The file must have PNG, XPM, SVGZ or SVG extension (JPG and PDF don't work)


• Then go in Settings > Configure > Annotation


• Click "Add", choose "Stamp", give it a name and put the file name without extension and without path into the "Symbol" field. It should show the image at once.


• Click OK.

Now you can use the file as a stamp. However, it will be distorted since it must be a square image and reduced in quality to fit the 128x128 (?) size required for stamps.