Signal with little amplitude and offset in LTSpice
If you are in Windows, go to the plot display pane of your signal in LTspice. At the top center, there is a nice "net" name there (could be more than one.) Right click on that and a dialog box will pop up. In the bottom half of that dialog box, is an area with a heading that says "Enter an algebraic expression to plot:". Underneath, you will see the equation used, currently. This is probably just a node name, for now. Move your cursor into the box, left click once to get your text cursor, and move around until you are at the end of the node name. Append "-1" to it. (Or some other value.) This will subtract "1" from the signal. (You said the offset is one, so this subtracts that from the signal." Now just click on the "OKAY" button in the upper right. The display will change. Or, if it doesn't seem to, just right click on the data curve itself and click on "Zoom to Fit." That should get it, if it didn't do so otherwise.