To change the sort order you can only currently select from what is available on your office website
* (more may be added as feature developement)
To check what's available go to your office website
Then perhaps go to Buying for example
Then View properties for Sale
Then change the current sort order pictured below and select the sort order you wish to have it sort by
For example: Highest Price.
The URL will change and you will need to copy part of that URL beginning from /search/property-for-sale/....
For example: /search/property-for-sale/page-1?sort=price_desc&surrounding=False&liveability=False
Once you have copied this you will need to go to the website admin in Dashboard.
Click on Pages > find Buying (or whichever megamenu you wish changed) then view properties for sale (or sub category) Then find the Link URL and change it to that URL you copied earlier. > then Save.
Check the website and the sort order should have changed.