With the IndpntAsk setting, the independent variable (X, T, θ, or n depending on Graphing_Mode) will not be calculated automatically in the table. Instead, when looking at the table, you must select an entry in the independent variable column, press ENTER, and enter a value. The values entered will also be stored to the TblInput list.
(To access the table, press 2nd TABLE, or use the DispTable command in a program)
The alternative, IndpntAuto, fills in several values starting at TblStart and increasing by ΔTbl, and makes the table scrollable (up and down).