Here are some tips that may be useful when using Goodnotes!

Change colour of drawing/handwriting

lasso tool -> tap -> colour -> pick colour

Resize writing/drawing

lasso tool -> tap -> resize -> move accordingly 

Search for writing/text

search button -> type word

Perfect shapes

draw a shape -> hold until thicker lines form -> move according to size

Change handwriting to text

lasso tool -> tap -> press convert -> copy and paste to where you want