Level 1: Correcting
This is basic copy-editing: spelling, punctuation and grammar are corrected, and consistent styling is imposed. Which is correct, realise or realize? Both are acceptable but a good editor will make sure that -ise or -ize endings are consistent throughout the text. The editor can work at Level 1 without consulting the author.
For example:
The police should have acted sooner to diffuse the situation.
The writer has confused diffuse (to spread over a wide area) with defuse (to reduce tension). The corrected version:
The police should have acted sooner to defuse the situation.
More Mistakes…
A Betterwrite editor spotted Easyjet in a novel they were proofreading. It should be easyJet. Readers will pick up small mistakes in your writing too.
At Betterwrite we saw this headline in a national newspaper
IF BRITAIN IS READY TO TACKLE SWINE FLU, PIG'S CAN FLY
We contacted the paper, and the editor sent us a nice letter of apology: the sub-editor hadn't noticed the apostrophe in PIGS.