The Y axis of a chart is also called the value axis.
Tip: For more information on showing or hiding axes, see Showing/hiding axes and axis titles.
Edit properties: To change the properties of the value axis, select it, right-click it to open the context menu and choose the command Value axis: Properties.
Tip: Alternatively, you can choose this command via the Edit properties icon 
on the ribbon tab Chart | group Chart elements. The other alternative is to double-click on the axis.
You can make the following settings:
Format tab
Tip: Lines can also be conveniently adjusted directly via the buttons of the ribbon tab Chart | group Chart elements. For more information, see Editing chart elements.
▪Line section
| Here, you can change the line style used to draw the axis. Auto uses a thin gray standard line. None removes the line. The option Custom lets you customize the line style. |
▪Major ticks and Minor ticks sections
| Here, you can determine whether small tick marks should be displayed to divide the axis and specify their appearance. |
▪Tick labels section
| Here, you can determine whether axis labels should be displayed and where to place them. |
Scale tab
You can use this tab to change the scale of the axis.
▪Lowest value and Highest value sections
| These options determine where the visible part of the axis should begin and where it should end. Select either the option Auto, which results in Presentations automatically determining the most appropriate values, or select Custom and enter the desired value yourself. |
▪Intersection between X and Y axis section
| You can use this option to determine where the X axis (category axis) should intersect the Y axis (value axis): |
| If Auto is selected, Presentations automatically determines the most appropriate value, and if Maximum value is selected, the X axis is positioned at the end of the Y axis. You specify your own Y value if you select Custom value. |
▪Major step value section
| Here, you can set the interval for the tick marks and labels on the axis. If you select the option Auto, Presentations automatically determines the most appropriate values. |
▪Minor step value section
| Here, you can set the interval between minor tick marks on the axis. If you select the option Auto, Presentations automatically determines the most appropriate values. |
▪Invert axis direction
| If this option is enabled, the direction of the axis is reversed. In a column chart, for example, the columns are no longer drawn from bottom to top, but from top to bottom. |
▪Logarithmic scale
| If this option is enabled, the axis will use a logarithmic scale (for example, 10, 100, 1000, etc.) rather than a linear scale. |
Font tab
You can use this tab to change the formatting of the axis labels.
In addition to font, font size, and text styles, you can also set the alignment, rotate the labels and change the numeric format.