How can I achieve something like this (i.e. an output in a worksheet)?

It is important that the variables of the lables match the columns.

In the attached file is a typical dataset. A display of row lables would be optional.

Context: Easier interpretation (of the structure) of a Jacobian and subsequent manual solving the equations of interest that correspond to the rows.

Labels_for_sparse.mw

What I want to achieve with a command is the following image, in which the elements of a matrix that are not zero are displayed in black

This can be accomplished with the Browse Matrix Dialouge, but I want to make such images part of the worksheet. (Display of the full matrix is important.)
Context: Re-execution of worksheets will allow for quick verification of changes in Jacobians.

Multibody exports from MapleSim to Maple convert a symbolic expression to a rational quotient:

The parameters (parameter "a" above) disappear in the exported equations. How can I prevent this (conversion of sqrt3 and disapprence of "a")?

MB_exports_with_rational_quotients_instead_of_symbols.msim

Expressions of the kind

A cos(phi) - B sin(phi)

are solved by Maple to phi=arctan(A/B)

In such cases: Is there a way to get a solution phi=arctan(A,B) other than in the attached?

If not: Can the attached solution be done more efficient? There are quite some commands involved.

(It may happen that Maple returns "minus arctan". Then the attached solution does not work and has to be preplaced by something more complicated. A solution that always work would be desireable)

MB_exports_Schatz_Mechanism.mw

The Examples section on the help page of a command is important for learning, but cannot cover all uses. This is especially true for general purpose commands like "solve" or "simplify". Searching all help pages that contain the word "solve" results in too many irrelevant hits that do not contain examples.

Why does adding a bracket to a command not filter for help pages with examples using the command?

Inside a help page Find/Replace finds such strings.