Basics about Diffraction Pattern Graphics

The diffraction pattern provides a graphical view to the powder diffraction pattern of the unknown sample as well as to the patterns of all entries marked/selected in the candidate list. If you would like to view a reference database pattern in addition to the one of the unknown sample, simply mark the corresponding line in the candidate list by clicking on it using the left mouse button.

You can import more than one diffraction pattern (multiple patterns option). In order to do so, simply press the "+"-button in the top right corner again (or use the "Pattern / Insert/overlay..." menu command or the <Ctrl+I> keyboard shortcut.

Once two or more diffraction patterns are present, they are displayed on top of each other in the pattern graphics area. The bottom-most pattern (the so-called "anchor pattern") is the one to which the content of the candidate at the bottom refers to. If you swap patterns (see below), the candidate list will be updated if you swap the bottom most pattern and the one above. On the contrary, the match list is not affected by this. The background is that the multiple patterns option is not intended to have multiple phase analyses in one session. The swapping shall only support the decisions on the presence of critical phases.

If multiple diffraction patterns are displayed, you can adjust the distance between them: Place the mouse cursor to the right of the diffraction pattern until the mouse cursor changes to , then turn the mouse wheel up or down in order to decrease or increase the vertical distance between the experimental diffraction patterns. As an alternative, you can increase or decrease the pattern distance using the <Ctrl+'+'> or <Ctrl+'-'> shortkeys.
You can also toggle between full and zero pattern distance by pressing the mouse wheel (center button) if this cursor is displayed.

If the distance between multiple experimental diffraction patterns is at maximum or minimum value, the corresponding y-axis scale(s) are displayed on the left-hand side. However, if the pattern distance is somewhere between these two extrema, the y-axis scale is hidden.

You can exchange (swap) patterns in the pattern graphics using the corresponding command in the pattern menu. This menu can be opened for each additional pattern by clicking on the corresponding button in the top right corner of the corresponding diffraction pattern. (The pattern menu is not available for the anchor pattern.)
By running the corresponding command " Swap places with pattern below", you can swap an additional pattern with the pattern below. The same command is also available in the main menu "Pattern / Additional patterns / ".

Using the corresponding command in the pattern menu just mentioned, you can also remove an additional pattern.

The color of the first unknown sample's pattern is blue by default; the color of the profile calculated from the peak data is green by default. The colors of the database patterns are assigned automatically, depending on the order of marking/selecting. For instance, the diffraction pattern of the entry which has been marked or selected first is automatically displayed in red, the second marked entry in green etc. You can also assign colors manually. Note that any modified colors are only stored in the current document. For any other/new document, Match! will use the default colors again.

The entry numbers and names of the patterns displayed are given in the legend in the top right corner of the pattern; the radiation and its wavelength are displayed in the lower left corner. If the profile calculated from the peak data is displayed and raw (experimental) profile data are present, the corresponding Rp-factor is given in the legend as well.
If the peak data of a match list entry result from a pattern decomposition calculation, this is indicated by a "[PD]" in the legend of the pattern graphics.

There is a variety of options concerning what should be displayed described on a separate page.