How to add a Signature stamp to Okular

Question

I'd like to have my own signature as a stamp for Okular.

In folder /usr/share/okular there is a config file drawingtools.xml and in folder /usr/share/okular/pic the is a stamps.svg containing some pictures with stamps. But it seems not to be made for adding more pictures.

Is there a easy, lean and clean way to insert my own graphic?

Edit:

I found this:

source: https://wiki.ubuntuusers.de/Okular/

Eigene Stempel definieren

Okular bietet die Möglichkeit, eigene Stempel zu definieren, die dann als Markierung ins Dokumment einfügt werden können.

Dazu muss man zuerst den gewünschten Text oder das gewünschte Bild als .png oder .svg Datei im Homeverzeichnis unter .kde/share/icons speichern, Dateinamen und Dateiendung dürfen ausschließlich aus Kleinbuchstaben bestehen. Sollte das Verzeichnis nicht existieren, dann muss man es vorher noch anlegen.

Danach wählt man das Menü "Einstellungen -> Anmerkungen einrichten" und dort "Hinzufügen -> Typ:Stempel". Im oberen Feld kann man einen eigenen, frei wählbaren Namen eingeben, im unteren Feld unter "Stempel Symbol" gibt man den Namen der zuvor gespeichert Stempeldatei ein. Findet Okular diese, wird eine Vorschau rechts neben der Eingabe angezeigt. Mit einem Klick auf "Ok" ist der eigene Stempel angelegt und einsatzbereit. Im Menü mit den Werkzeugen wird der Stempel jetzt angezeigt.

And the Google Translate version:

Define your own stamps

Okular offers the possibility to define own stamps, which can then be inserted as a marking in the document.

To do this you must first save the desired text or image as .png or .svg file in the home directory under .kde / share / icons, filenames and file extensions may only consist of lowercase letters. If the directory does not exist, you have to create it first.

Then select the menu "Settings -> Set up notes" and there "Add -> Type: Stamp". In the upper field you can enter your own, freely selectable name, in the lower field under "Stamp Symbol" you enter the name of the previously saved stamp file. If eyepiece finds this, a preview will be displayed to the right of the input. With a click on "Ok" your own stamp is created and ready for use. In the menu with the tools, the stamp is now displayed.

But putting a sig.png in .kde/share/icons didn't helped. It's not shown if entering the name as Stamp-Symbol.

I use Xubuntu 18.04

Solution

First, please place your image in ~/.kde/share/icons, creating the icons folder if need be. (To be on the safe side, please use lowercase for the image name and avoid spaces).

Then, as shown in the image above, you need to type or paste in the entire path and filename like

/home/rundekugel/.kde/share/icons/mysignature.png

assuming that your username is rundekugel and that mysignature.png is the relevant image.

This is a recognized usability issue in Okular version 1.3.3 that ships in Bionic and is being addressed in Make custom stamp image support more discoverable.

Comments

[Clément]

Excellent answer, thanks. Two notes: 1) The picture file can be anywhere, no need to put it in ~/.kde/share/icons/. 2) If the picture file is a jpeg or a jpg file, you should not specify the extension in the path (yes, that's weird). That is, use /home/rundekugel/.kde/share/icons/mysignature instead of /home/rundekugel/.kde/share/icons/mysignature.jpg.

[user12711]

I'm using Kubuntu 18.04, and this didn't work for me. I created the icons folder within .kde/share and copied the filename using <copy> from Dolphin-file-explorer both with a prepending "file:///" (which firefox finds and displays image of) and also with just the /home/me/.kde/share/icons/my.png ALSO, the png must be "flattened" in GIMP or other photoediting software (it may not have an alpha channel or transparency to it).

[DK Bose]

@user12711 please post your own answer and ping me when you do if you feel like. I think your answer will be very helpful. (I'm not going to be able to edit my answer to include your findings because I don't have time.) Thanks!

[GTF]

I get this warning when trying to create a stamp: "Warning: experimental feature. Stamps inserted in PDF documents are not visible in PDF readers other than Okular."

[DK Bose]

@GTF, sadly, quite a few features, not just stamps, don't appear to work in other PDF readers.

[andschar]

This is exactly what @DK Bose answer says. "Paste in the entire path...".

[John]

@GTF Also, if you print a PDF with a stamp to another PDF, the stamp is NOT included (but text annotations are).

[John]

However, there is this answer on another SE site which solved my problem.

[GTF]

@John I also use XournalPP for this now, but it's a bit of an ugly workflow compared to e.g. Preview on macOS.