# 13.5.3 Propagation model plugin

To create or modify a library element containing parameters of a particular propagation model, select the **<span class="fabric-text-color-mark" data-renderer-mark="true" data-text-custom-color="#000000">Propagation model</span>** command from the **<span class="fabric-text-color-mark" data-renderer-mark="true" data-text-custom-color="#000000">Library pull-down menu</span>** or directly with **<span class="fabric-text-color-mark" data-renderer-mark="true" data-text-custom-color="#000000">CTRL+SHIFT+P</span>**.

Since the propagation models are implemented as plugin, it is possible to include a new propagation model using the .jar installer and to add it to the list of existing pre-defined models. Any of the propagation models is then selectable as shown in the picture below:

![image.png](https://wiki.cept.org/uploads/images/gallery/2026-06/scaled-1680-/qnwFTcvbvnR5teB4-image.png)

<div class="rich-media-item mediaSingleView-content-wrap image-align-start css-1xiw3k3" data-layout="align-start" data-media-vc-wrapper="true" data-node-type="mediaSingle" data-renderer-start-pos="469" data-vc="media-single" data-width="343" data-width-type="pixel" id="bkmrk--1"><div class="css-puub9j"><div data-alt="" data-collection="contentId-493072" data-context-id="493072" data-file-mime-type="" data-file-name="file" data-file-size="1" data-height="445" data-id="8dd5746e-8039-47aa-8119-2e66e1def96a" data-node-type="media" data-renderer-start-pos="470" data-type="file" data-width="611"><div class="_2rko18qm _vchhusvi _kqswh2mm _ect4ttxp _p12f1osq _c71l1osq _1bsb1qmm _4t3ine4n _1hlmd0i9 _1rquusvi _eg541i5c _mts3kb7n _1ntskb7n _yfmhtlke _5sb1v00u new-file-experience-wrapper" data-media-vc-wrapper="true" data-testid="media-card-view" id="bkmrk--2" role="none"><div class="_1reo15vq _18m915vq _2rko18qm _1e0c1txw _kqswh2mm _p12f1osq _1bsb1osq _4t3i1osq _c71l1osq media-file-card-view" data-cursor="pointer" data-test-media-name="8.png" data-test-progress="1" data-test-source="remote" data-test-status="complete" data-testid="media-file-card-view"><div class="_kqswstnw _1bsb1osq _4t3i1osq _1e0c1txw _2lx21bp4 _1bah1h6o _4cvr1h6o" data-testid="ImageRendererWrapper">![](blob:https://ecowiki.atlassian.net/12ad722e-f87f-4b62-ba14-f0120219ae5c#media-blob-url=true&id=8dd5746e-8039-47aa-8119-2e66e1def96a&collection=contentId-493072&contextId=493072&width=611&height=445&alt=&clientId=113268fe-fe5b-4bc3-8ff3-07965dbf1d18)</div></div></div></div></div></div><div class="fabric-editor-block-mark fabric-editor-alignment align-center" data-align="center" id="bkmrk-figure-298%3A-example-">**Figure 298: Example of the propagation model plugin library**</div>More detailed information on specific propagation models is available in ‎ANNEX 17: