Q: Can one change the title that a matrix displays? Also is there a limit on the length? A: Yes. To make this change type "<@ your new title" (without quotes) in the parser/evaluator and then depress enter. If the title is more than two lines long it may ruin the print routine. Q: Does the registered version view larger matrices. A: The registered version keeps evolving in response to customer's needs. As of this writing one can view a single column matrix of 5000+ elements, a double column of 2500+ elements. The largest square matrix at this point is still 64x64 but that will quickly change. Q: Can I input a matrix file created in Excel into MtrxCalc and vice versa? A: Yes you can now import (using the file menu and import command) matrices created in Excel and saved as csv-text files. And ofcourse you can save matrices as text files also. See the help files. Q: Is there some way I can perform different transformations on different columns of a matrix? A: In the latest version I can give partial yes. You can use the col() function to extract a column, or simply start with column matrices and then when finished with the transformation concatenate them into a single matrix. To perform the natural logarithm transformation on column matrix C use the apply() function as in apply(ln, C). You can use apply() with any of the scalar functions supplied such as sin, cos,tan,...sqrt,abs,re() and etc. but unforunately functions square() & cube() are not provided in this demo but will be in the registered version. Q: I keep forgetting to save the matrix I am currently working with to some other name and then I lose it. It's frustrating! Can't it be saved automatically? A: Not at present. We are working on saving the current and the next previous but this is not yet ready.