You will see many "grids" in the system. Here are the basics for sorting and filtering grids.
Columns
Click on the Field Chooser at the top left and check or uncheck columns.
Group
Click and drag column headers into the light grey box in the upper left that says "Drag a column here header here to group by that column".
Alpha/Numeric
Click the header to order and reverse order of that column (indicated by a triangle pointing up or down).
NOTE: You can sort by more than one column by holding down shift and then clicking another column.
To Filter
Click on the box below the column header and either select the A box to select parameters such as Greater Than, Starts With, Contains, etc and/or type into the box below the column, or click the down arrow to sort to a specific value present, or select (Blanks) | (Non-Blanks) | or (Custom) which will allow you to add several criteria for your filter.
To clear all filters click on the box on the top left with the diagonal line.
NOTE: How you leave your grids when you close the screen is how the system will remember it for you, as a user preference.