When I try to insert a letter into a word I have typed, instead of making the word longer, it deletes a letter in the word instead, hard to describe! I think I must have touched a button, but can't work it out! can you help ?
Thanks Scotman, I have found the insert key, top right also has PrtScn and Sysrq on same key -- and pressed it, also pressed it with Shift key, but doesn't make any difference !!
...or at the bottom of the window, under your document but above the taskbar, you should see OVR in bold. Double click this and it will un-bold and you'll be back to normal.