The ‘Graphematics’ menu allows you to search for:
Looking for sound positions and their graphic representations
To look for graphic representations, you enter the sound position(s) you are interested in into the field ‘sound positions’. You will need use a backslash preceding '(', ')', and '+': '\(', '\)', '\+' because regular expression work theoretically, but I strongly advise against their use in this context.
If you want to specify a left or right context in which to look for the sound position in question, you can do so in the appropriate fields. Regular expressions are allowed without restriction here, except that you may not use the cover symbols 'C', 'V', '-', and '+' within square brackets. Use parentheses instead, e.g. 'a-?C(C|-)*' to specify a left context of 'a' followed by at least one consonant and an indefinite number of morpheme boundaries (check out the vowel harmony in Holm perg 34 4to!).
When specifying the left or right context, you may use the following cover symbols:
The search result will be presented as follows: Primarily, it is organized by how the groups of sound positions that might be represented jointly with the sound position(s) in question. You may expand the results by clicking on it. Secondarily, it is organized by the graphic sequences representing the sound position(s) in question (together with the jointly represented ones). Click on these to view individual hits.
Looking for graph types
The search for graph types (which you may switch to by clicking on the appropriate slogan) allows you to view all the attestation for individual graph types. So far, you can only look for individual graph types, not sequences. You may restrict your search to the manuscript's main text, to chapter headings, litterae notabiliores, or initial letters - or any combination thereof.