Working with Apps - Implementing Splunk: Big Data Reporting and Development for Operational Intelligence - page 179

Customizing the launcher icon
The launcher icon is seen both in the Home app and in Splunkbase, if you decide to
share your app. The icon is a 36 x 36 PNG file named appIcon.png . I have created a
simple icon for our sample app (please don't judge my art skills):

To use the icon follow these steps:

1. Navigate to Manager | Apps.

2. Click on Edit properties next to our app, Implementing Splunk App One.

3. Click on Upload asset and select the file.

4. Click on Save .

Our icon will now appear on the launcher screen, like in the following screenshot:

Using custom CSS
The look of the Splunk application is controlled via CSS. One common element
to change is the application icon in the application bar. Follow these steps to do
just that:

1. First, create a file named application.css . This file will be loaded on
every dashboard of the application containing it. The CSS is listed later
in this section.

As of Splunk Version 4.3.2, the first time application.css is
added to an app of Version 4.3.2, a restart is required before the file
is served to the users. Subsequent updates do not require a restart.