it is not clear what kind of Sagemath interface you were using; e.g., if you used a "usual" text editor then it's a question about this particular text editor (e.g. if you used vim then you should consult vim manual).
If it was SMC (SageMath cloud) then this question should be asked in sage-cloud Google Group, and not here.
I cc there, just in case.
On Friday, August 19, 2016 at 9:53:12 PM UTC+1, Andrew Aran wrote:
I was doing some school work and after making a few revisions to my code i came to realize that i had typed over some of my work. I was wondering how to turn off this feature.