[RWP] Cockos Wiki Selecting items, may help with selecting trax?

[Indigo]

AS usual, this is for mouse, but there can still be clues here:
Contents
1 Editing in REAPER
1.1 Selecting Items
1.2 Split Items
1.3 Copy Items
1.4 Paste Items
1.5 Cut Item
1.6 Delete Item
1.7 Looping an Item
1.8 Fade In
1.9 Fade Out
1.10 Volume
1.11 Item Processing
Editing in REAPER
Item Editing in REAPER is non-destructive. Edits made to Items are 
unique per Item and do not alter the content of the Source file. So feel 
free to experiment knowing that your original recorded files are safe.

Selecting Items
▪Select an Item by Left-Clicking on the Item. The color of the Item will 
change to indicate it has been selected.
▪Select multiple Items by using [Ctrl]+Left-Click.
▪Select adjacent Items by using [Shft]+Left-Click.
▪Select groups of Items by holding down the Alt key, then right-clicking 
and dragging a marquee around the Items: [Alt]+Right-Click & Drag.
▪Toggle the selection status of multiple Items by holding down the Alt 
and Ctrl keys, then right-clicking and dragging a marquee around the 
Items: [Ctrl]+[Alt]+Right-Click & Drag.
Split Items
▪If no Item is selected, pressing S will split all Items on all Tracks 
at the Edit Cursor position.
▪If Item(s) are selected, pressing S will split all selected Item(s) at 
the Edit Cursor position.

Copy Items
There are several ways to copy Item/s in REAPER
▪Use Keyboard Shortcut Ctrl+C to copy any selected Items
▪Right-click on an item and select Copy selected items from the menu
▪Select an item, then select Edit > Copy selected items
▪Hold down the Ctrl key while dragging the Item(s)

Paste Items
There are several ways to paste Item/s in REAPER
▪Use Keyboard Shortcut Ctrl+V to paste an Item at the current cursor 
position. If a Track is selected, the Item will be pasted into the 
selected Track. If no Track is selected, the Item will be pasted into 
the last selected Track.
▪Right-click on a Track and select Paste from the menu. If a Track is 
selected, the Item will be pasted into the selected Track. If no Track 
is selected, the Item will be pasted into the last selected Track.
▪Select Edit > Paste. If a Track is selected, the Item will be pasted 
into the selected Track. If no Track is selected, the Item will be 
pasted into the last selected Track.

Cut Item
Cut removes the Item to the Clipboard. There are several ways to Cut Items.
▪Use Keyboard Shortcut Ctrl+X to cut selected Item/s.
▪Right-click on a selected Item and select Cut selected items from the 
menu.
▪Select Edit > Cut selected items.

Delete Item
Delete completely removes the Item from the project. There are several 
ways to Delete Items.
▪Use the Delete key to delete selected Item/s.
▪Right-click on a selected Item and select Remove selected items. This 
will delete any selected Items.
▪Select Edit > Remove selected items.
NOTE: All selected items will be affected by these processes. The 
original items will remain, however, as Reaper is non-destructive. It is 
most important to remain aware of what you have selected or unintended 
consequences will follow e.g. deleting more items from the project than 
what you intended to delete.

Looping an Item
All Items except Empty Items can be Looped. The Loop point is defined by 
the duration of the source Media. If you insert an Item that is four 
bars long, it will Loop every 4 bars, if it is 8 bars, it will loop 
every 8 bars, and so on.
To Loop an Item:
1.Mouse over an edge of the Item until the Cursor changes to a 
double-headed arrow.
2.Drag the Cursor to extend the Item. Each Loop Point will be indicated 
by a notch in the edges of the Item.
3.Extend the Loop as required.
The length and play rate of the Looped Item will be displayed as you 
drag the edge of the Loop.

Fade In
A Fade In raises the output volume of an Item from 0dB at the start of 
the Fade In up to the Fader Volume of the Track at the end of the Fade In.
To create a Fade In:
1.Mouse over the starting edge of the Item until the cursor changes to a 
Fade Cursor.
2.Drag the edge of the Item to the right to create the Fade In. The 
duration of the Fade In you are creating will be shown to the right of 
the Cursor as you drag the edge of the Item.
3.Release the mouse to complete the Fade In.
You can also set a Fade In duration through the Media Item Properties 
window.

Fade Out
A Fade Out lowers the output volume of an Item from the Fader Volume of 
the Track at the beginning of the Fade Out down to 0dB at the end of the 
Fade Out.
To create a Fade Out:
1.Mouse over the edge at the end of the Item until the cursor changes to 
a Fade Cursor.
2.Drag the edge of the Item to the left to create the Fade Out. The 
duration of the Fade Out you are creating will be shown to the right of 
the Cursor as you drag the edge of the Item.
3.Release the mouse to complete the Fade Out.
You can also set a Fade Out duration through the Media Item Properties 
window.

Volume
Item Volume is independent of Track volume. Item Volume can be set per 
Item, or for multiple selected Items by adjusting one of the selected 
Items.
To set Item Volume:
1.Mouse over the top edge of the Item until the cursor changes to a 
vertical double-headed arrow.
2.Drag the cursor to lower the Item Volume. The Item Volume will be 
shown to the right of the Cursor and the Peaks will be redrawn to 
reflect the change in Peak Volume as you drag the edge of the Item.
3.Release the mouse to complete the change in Item Volume.
By default, you cannot drag the Item Volume above 0db. This behavior can 
be overridden by pressing the SHIFT key while changing the Item Volume 
or could be permanentely changed in the Media preferences dialog to have 
the volume range go from -inf to +6dB.
You can also set Item Volume and raise it above 0db by using the Volume 
Fader in the Media Item Properties window.
Item Processing
The Item processing sub-menu can be found when you right click on an 
event and consists of Normalize Selected Items, Auto trim/Split Selected 
Items, Quantize Items Position to Grid and Move items to Source 
Preferred Position

Normalization of an event in REAPER is non-destructive and is extremely 
useful for raising the overall volume of an event without having to 
touch the track's volume slider or use an envelope. Normalize will 
simply raise the volume of the event so that the highest peak reaches 
0dBFS. Keep in mind that you can still lower the volume of the selected 
event by using the item volume adjustment tip above, and that event's 
peaking at 0dB will not produce audible digital clip noise unless either 
the master buss clips, or a plug-in overloads internally.
The Auto Trim/Split function is incredibly flexible and useful for drum 
editing when combined with 'quantize item positions to grid'