If you would like to copy/repeat a recipe you have found in your meal plan then you can do this quite simply.

Find the recipe you would like to copy in the planner. Click on the "copy" button and then "To Another Day". You will then be able to select a day and meal slot to add the recipe to by clicking on the tick boxes (you can click multiple boxes).

Tick the box for "replace recipe" if you would like any recipes in the destination meal slots to be replaced with the recipe you are copying. 

If you are using the meal planner on the desktop then you can also drag and drop recipes to different meal slots.