When items of the presentation already exist, they are listed as a tree view in the dock window Items. The window can be docked to any side of the main window of Kpl. It also can be undocked to show as a separate window. When the window is left open, it will reflect changes in the item list.

In case of a frame, an arc, a rectangle, or an ellipse its position and size is shown in the item list; in case of an array the name of the data file as well as the column indices of x and y values, in case of a 3D array the name of the data file, in case of a function or a 3D function the names of the shared library and the function, in case of a parametric function the names of the shared libraries and the functions for x(t) and y(t), in case of a spline the order of the polynomial, in case of a legend or a text the text and the position, in case of an image the name of the EPS file and the position, in case of a scale bar its orientation and position, and in case of a line or an arrow its position and direction. In case of an array, a function, a parametric function, a spline or a legend in addition the plot symbol is shown in the selected color. Colors are also indicated for arc, rectangle, ellipse, line, arrow, and scale bar items.

In the tree view frames are displayed one hierarchical level higher than the other item types. Other items following a frame are to be plotted in that frame. The sequence of items belonging to a frame ends when another frame item follows. Items not belonging to a frame, that is, items not following a frame item, will be plotted without a frame. Function and data set values then will be interpreted as cm. 3D arrays and 3D functions contain the function of frames and therefore do not need an additional frame item; also other items can belong to them. The position of an item can be changed using Up, Down, Top, and Bottom from the menu  Edit and by Drag and Drop within the list using the mouse.

Each item is preceeded by a checkbox field, displaying its activation state. Activated items are shown in the plot, deactivated items are hidden. The state can be toggled by clicking the checkbox field with the left mouse button or by the item's context menu, which pops up when an item is clicked with the right mouse button.

An item can be selected without changing its activation state by clicking it right of the checkbox field. More than one item can be selected by holding down the  Ctrl key when clicking the items. Several actions for selected items can be found in the menu  Edit.

In the tree view, frame items may closed to hide their children for clearness by clicking the arrow symbol. Reopening to show their children is done by clicking the arrow symbol again. The corresponding state of the frame items will be saved in the plot files.