Windows Overlays Window

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Bitmap Overlay

1. For the first point, click the Xpixel 1 button, and then click on the point in the bitmap spectrum. Enter the corresponding frequency at Frequency1 in the grid.
2. For the second point, click the X pixel 2 button, and then click on the point in the bitmap spectrum. Enter the corresponding frequency at Frequency2 in the grid.
3. The Units may need changing; the default will be cm^-1 but other units, including wavelength, can also be set in the settings grid to the right or bottom.
   

1. Click the baseline button and then click on a point on the baseline in the spectrum.
2. Click the maximum button, and then click on a point on the highest point of the spectrum.
3. If you need to change the vertical range produced (the default is 0 to 1) change the BaselineIntensity and MaximumIntensity values in the grid.
   

	Load overlay file
	Save all overlays
	Save all overlays to different file
	Copy current overlay to clipboard
	Add another overlay from the clipboard
	Select the active overlay
	Fix all parameters
	Cycle through units, converting parameter values. For overlays this will just convert the frequency limits, so it is of limited use.
	Displays all the loaded overlays; select the top item for settings that apply to all; right click on an item for additional item.
	Display and edit a comment on the current overlay..

This is where the start and end frequencies, baseline and maximum intensities are set manually. See the top of the page for how to use these. A frequency offset can also be applied, if necessary.

This sets the units for the horizontal and vertical scales, and allows the overlay to be optionally hidden on the main plot. (The colour is ignored for bitmap overlays.) The pixels corresponding to the calibration points in the grid above can be set manually here, though this is normally done with the mouse following the procedure at the top of the page. A red highlight indicates that the next click of the mouse in the plot window below will set that value.

	Add overlay from file
	Export current overlay to file
	Show selected region only
	Shrink plot
	Toggle display between fit to window and actual size
	Reset plot zoom to fill window
	Set point for Frequency 1 with the mouse
	Set point for Frequency 2 with the mouse
	Set baseline point with the mouse
	Set maximum intensity point with the mouse
	Cancel setting points by mouse
	Set top left of region to trace
	Set top right of region to trace
	Set bottom left of region to trace
	Set bottom right of region to trace
	Set all four corners of region to trace
	Displays the additional options below.