user4197: I dropped +100 images in After Effects, I would like to make a simple slideshow, and for this I have to separate/slice each layer sequentially every 5 seconds (that is the duration I want for each image/transition). 
Please see the image below to understand better what I mean:

So, I wonder if exists a simple technique to do this programatically with all the layers, instead of manually dragging one per one. Maybe a simple hotkey combination to move the start of the layer to the current position in the timeline, or better a built-in feature like "Expressions" or maybe a external script or plugin for AE?.
UPDATE:
I found a expression example that I think it could be helpful for what I want, however, I can't find the way to adapt it for the simple task that I require. (my After Effects knowledges are very basics)

Expression example: Create a trail of images 


user1950: No scripting or expressions are needed, it's built-in to After Effects:

Drop all your frames into a comp… 
go to the 5 second mark…
with all layers selected, hit alt] or option] to trim the end of the layer to the current time…
still with all the layers selected either right-click or go to the top menu and choose Animation>Keyframe Assitant>Sequence Layers…
in the dialog that comes up you can choose to overlap the layers and to add dissolves. Usually for a slideshow you will choose to dissolve the top layer only. Dissolving top and bottom layers mean that the background shows through in the middle of the dissolve.


4197: <p>I dropped +100 images in After Effects, I would like to make a simple slideshow, and for this I have to separate/slice each layer sequentially every 5 seconds (that is the duration I want for each image/transition). </p>

<p>Please see the image below to understand better what I mean:</p>

<p><a href="https://i.stack.imgur.com/PW7jz.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PW7jz.png" alt="enter image description here"></a></p>

<p>So, I wonder if exists a simple technique to do this programatically with all the layers, instead of manually dragging one per one. Maybe a simple hotkey combination to move the start of the layer to the current position in the timeline, or better a built-in feature like "Expressions" or maybe a external script or plugin for AE?.</p>

<h2>UPDATE:</h2>

<p>I found a expression example that I think it could be helpful for what I want, however, I can't find the way to adapt it for the simple task that I require. (my After Effects knowledges are very basics)</p>

<ul>
<li><a href="https://helpx.adobe.com/after-effects/using/expression-examples.html" rel="nofollow noreferrer">Expression example: Create a trail of images</a> </li>
</ul>
 1950: <p>No scripting or expressions are needed, it's built-in to After Effects:</p>

<ol>
<li>Drop all your frames into a comp… </li>
<li>go to the 5 second mark…</li>
<li>with all layers selected, hit <kbd>alt</kbd><kbd>]</kbd> or <kbd>option</kbd><kbd>]</kbd> to trim the end of the layer to the current time…</li>
<li>still with all the layers selected either right-click or go to the top menu and choose <strong>Animation>Keyframe Assitant>Sequence Layers</strong>…</li>
<li>in the dialog that comes up you can choose to overlap the layers and to add dissolves. Usually for a slideshow you will choose to dissolve the top layer only. Dissolving top and bottom layers mean that the background shows through in the middle of the dissolve.</li>
</ol>
