# Table Compare Row Settings

These settings control the algorithm for aligning rows in the comparison when no keys are defined. To edit a different comparison sheet, pick it from the Sheet dropdown list. Unmark the Use default checkbox to change row alignment settings for the current sheet. Pick Unaligned to compare files without aligning rows based on their content. Pick Standard alignment to align the files by comparing successively smaller sections of each file. Parts of the alignment can be shown before the entire comparison is finished. Pick Myers O(ND) alignment to align the files using a common LCS (Longest Common Subsequence) algorithm. This can give better matches in certain cases, such as large inserts or when the files contain a lot of repeating text. Since files are compared all at once, larger file scans take much longer than the standard method, and the files are not displayed until the comparison is complete. It does not support similarity comparisons, so mismatches will be grouped in blocks. Pick Patience Diff alignment to align the files using Bram Cohen's algorithm. Mark the Never align differences checkbox to show rows with important differences as blocks of added and deleted text rather than changed text. The Skew tolerance specifies the maximum number of rows that the algorithm will check when looking for a match to a particular row. Increasing it can improve the alignment, especially if there are large gaps. Of course, the comparison may also require more time. Mark the Use closeness matching checkbox to attempt to align the remaining mismatched rows based on their similarity. Pick Sort rows before alignment to reorder the rows before aligning them. To change the Default Row Alignment settings, click the Edit Default button.