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I want to customize a bit the look of the ISIS admin template in Joomla 3. Need to add a few custom css for colours, and hide a few elements here and there. What is the best way to do this?

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    Such a short question, yet still the best one I've seen in the last 24 hours
    – Lodder
    Commented May 18, 2015 at 15:23

3 Answers 3

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Custom.css for Joomla 3.4.1 and later

This method is the easier for custom CSS overrides for the admin template. Simply create a custom.css file and place it inside the css folder of the ISIS template, like so:

administrator/templates/isis/css/custom.css

The template will load this css file last, so any css rules declared there, will override the core ones.

Remember that this is a new feature introduced in Joomla 3.4.1. Earlier versions had no core - support for this.

Older Joomla Versions: Clone the template

Before introducing the custom.css feature for Joomla admin template, you had to copy/clone the ISIS template, inside the template manager, and then work it like a totally separate custom admin template. This method will allow a lot of flexibility in creating a customized template, not only on the css level.

However, with the rather quick speed that Joomla core is changing, your template might need some extra work after any Joomla updates, to support any possible new features.

In any case, at this point all Joomla 3 installations should be up to date with the latest versions (current version 3.5.1). Versions before 3.4.8 are vulnerable - consider to update A.S.A.P.

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  • Thanks for updating the right answer with the info I provided, it will benefit everyone reading. I would have appreciated a point though :)
    – Eoin
    Commented Jul 10, 2016 at 14:53
  • @Eoin That was my answer from the beginning. I only improved its syntax and added the link to the admin template. I think you hadn't read my full answer at that time.
    – FFrewin
    Commented Jul 10, 2016 at 15:00
  • Oh yes, I stand corrected. Public apology. Sorry. (and hang my head in shame)
    – Eoin
    Commented Jul 11, 2016 at 22:06
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If you do not want to redo all stuff whenever you update Joomla, create a copy of the template and use template manager to modify its files. If you wish to modify files using local editor, make sure your file editing software can save files with utf-8 encoding.

Please see below documentation: https://docs.joomla.org/J3.2:How_to_use_the_Template_Manager

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It's even easier than the other answers suggest. In ISIS you can upload a new css file custom.css. You need to upload this in:

administrator/templates/isis/css/custom.css

The template will automatically pick it up and start using it. It also loads it last so your styles will be more specific. This feature is available from Joomla! 3.5 onwards.

The reason this would be preferable to duplicating a template is because:

a) In the event of template updates you would need to maintain your duplicate template.

b) That leaves you open to security vulnerabilities.

c) You are probably only making small changes, so you don't need to copy an entire tempalte.

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