Sorting items (and groups of items) on an Estimate is easy!
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Step 1: Open an invoice and click 'Edit'
​Step 2: Click & hold an item or group to drag it to a new location.
​Step 3: Done

Step 1: Open an Estimate and tap 'Edit'
​Step 2: Tap on the blue dropdown next to the 'Estimate Option 2 of 3' shown in the image below.
​Step 3: Tap 'Sort items'
​Step 4: Tap & hold to sort groups or tap into a group to sort items.
​Step 5: Done
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