How to fill out.
Before inputting any vector, select the input method (by the coordinates or by the points), and the coordinate system (Oxy, Oxyz). Then input the vector.
To enter a simple fraction, use the "/" button, to enter a decimal fraction, use ".".
Examples
To input a vector $A↖{\_}$ with coordinates $(-5, 1/5)$ and vector $B↖{\_}$ with coordinates $(3, 1/3)$  fill out the form as follows:

To input vectors ${AB}↖{\_\_}$ and ${CD}↖{\_\_}$, with points А = $(-5, 1/5)$, B = $(2, 9)$, C = $(3, 1/3)$ and D = $(0.1, 0)$, fill out the form as follows: