These take the format of standard windows functions plus some additional functions unique to One Cat Doodler. Cat Doodler is supplied with a comprehensive, multi-page help file. Every aspect of the application is covered in small enough chunks to enable easy navigation. The helpfile goes into some detail to give examples of using the application. And A Cat website and is detailed on its own helpfile page.
More memory is used as a picture is built-up.
In general terms One Cat Doodler is very good. Although in operation I encountered one bug where there appears to be a limit to the length of a scribbled line, in practice this is not an issue. I am a little concerned about performance. One Cat Doodler re-draws the entire screen each time an object is selected, moved or created, which makes the program start to crawl when there are a number of objects in the image. There should be some work done to stop the screen re-drawing when unnecessary.