To insert the tick (✓) symbol into a Writer document, follow these instructions.
From the menu (in Windows and Mac) click on Insert –> Special Character.
From the Font dropdown, you need to select a font that will include the tick symbol. Times New Roman does NOT include this symbol. One font to use is OpenSymbol.
Select OpenSymbol and then scroll down until you see the tick symbols – see screenshot for an example.
You can double click on the symbol to insert into your document, or click once on the symbol and then click ‘OK’.