You can set the linear or logarithmic scale for graphs by selecting the respective entry from the Scale drop-down list in the device performance page toolbar.
Furthermore, you can add a 95-percentile line, a trend line or both to graphs by selecting the respective entry from the Statistics drop-down list in the device performance toolbar.
Note: 95-percentile and trend lines
A percentile is the value of a variable below which a certain percent of observations fall. Therefore, the 95-percentile line is a line under which you will find 95% of observations.
Trend line is a straight line connecting multiple points on a chart. A trend line is used in technical analysis to determine the direction and strength of a trend. An up trend line has a positive slope and connects at least two low points on a chart. A down trend line has a negative slope and connects at least two high points on a chart. The steepness of the slope of a trend line indicates the strength of the trend.
To view more detailed graphs and tables for any metric, click on its graph/chart in the device performance page. After clicking on a graph to display it in detailed page, you can zoom into a specific time interval by selecting a specific time period in a graph with your mouse.