Toolset provides a training system to learn and explore Toolset plugins and themes. It is a free service that allows you to see demos of pre-built, fully working websites and create your own training sites to experiment with Toolset.
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Problem:
The user would like to change the currency and the surface icon in the Real Estate demo site.
Solution:
Regarding the $ symbol, it is used in the format of the price field inside the blocks template. Let's take the homepage as an example, and focus on the "Recent Properties" section, it is a view, where the price is added to the view's loop with the format "$FIELD_VALUE". Check this screenshot http://prntscr.com/112zryd
If I use the format "FIELD_VALUE €" I'll get "2500 €" in the output.
Regarding the icon of the surface, it is being added as an image inside a "Fields&Text" block. Check this screenshot http://prntscr.com/112zu0k
You will need to make the loop editor larger by choosing this option http://prntscr.com/112zv6x