After I have typed text onto an image using the text tool and then try to save it, the image turns into a kind of faintly transparent checker board.
Just to explain, above my text on an image layer in the layers box, there are two areas that add to my confusion. One is a grey rectangular box that has the word 'opacity' on the far left; then to the right are the numbers '100.0'. Below this is a whitish area that has on its left the word 'lock' and next to this word is an image of a paint brush and on the far right in this whitish area is a small square box showing a checker board.
Can anyone please help me? I've done something wrong but don't know what. I am new to GIMP.