BSL PRO Software Guide - Biopac

50 Part BSelecting an areaOnce you have selected a channel, you can “edit” parts of that channel by selecting a section of the waveform. Theoptions available to you include cutting, copying, and pasting sections of waveforms. You can also transform andanalyze entire waveforms or specific sections of waveforms.‣ IMPORTANT: When multiple waveforms are present, the highlighted area appears to include allof the waveforms, but most modifications and transformations apply only to the selectedchannel.For any of these functions, you will need to use the I-beamtool to select (or highlight) an area.To select the I-beam tool, position the cursor over the icon in the lower right hand corner of the screen and clickthe mouse button. Now move the cursor to the first point in the area that you wish to select. As you move the cursorinto the graph area, you will see it change from an arrow cursor to a standard I-beam editing tool.To highlight a section of a waveform:1) Position the I-beam at the left edge of the desired area and hold down the mouse button.2) Move the mouse to the right until the desired area is selected and then release the mouse button.To select an area that spans multiples screens:1) Click the I-beam at the start (left edge) of the section to be highlighted.2) Use the horizontal scroll bar to move to the desired endpoint (right edge) in the record.3) Hold down the Shift key while you position the cursor and click the left mouse button.This method of selecting an area allows you to “fine tune” the selected area to include only a specific range of data.To fine tune: coarsely select an area, then zoom in (using the Zoom tool) on either edge and shift-click with the I-beam to precisely select and/or align the edge of the selected area.To deselect an area:Click a new point of data with the I-beam tool to deselect the last area.Once a channel has been selected and a section of data highlighted, you can operate on and edit that section of thewaveform. The editing commands behave much the same way as the editing functions in a word processor. You cancut, copy, delete or paste sections of data as defined by the selected area. In most cases (depending on availablememory) you may undo an edit by choosing Undo from the Edit menu, or by using the CTRL + Z shortcut.Selecting a portion of a waveform allows you to apply transformations to a particular area, rather than the entire areaor all waveforms. Selecting an area also allows you to take snap measurements for parameters such as delta T, mean,standard deviation, frequency, and so forth. The measurement options are discussed on page 6157.ZoomAnother way to select an area is to use the “zoom” tool. The zoom tool allows you to select any portion of any waveand magnify it for closer analysis.To use the Zoom tool:1. Click the icon in the lower right portion of the screen.2. Positioning the cursor at one corner of the data region of interest and hold down the left mouse button.3. Drag the crosshair horizontally, vertically, or diagonally to form a “box” which encompasses the area you needto zoom in on.4. Release the mouse button.When you draw a Zoom box, the Biopac Student Lab PRO software will automatically adjust the horizontal andvertical scales for all waveforms, not just the selected one.To “unzoom” or repeat the zoom one level at a time, choose Zoom Back or Zoom Forward from the Displaymenu. You can select either function up to five times per zoom. Keyboard shortcuts are Ctrl-Minus (Zoom Back)and Ctrl-Plus (Zoom Forward).You can also use Zoom/Ctrl-Zoom to zoom in and out by a factor of 2 without drawing a zoom box.Visit the online support center at www.biopac.com