picasaView enables you to view your picasaweb-albums in your blog - simply by specifing a tag in your content.

Noted That:

To install correctly this picasaview.zip.
Fisrt Download the picasaview.zip to your computer
Extract/Open picasaview.zip to Your Computer.
Then, Find readme.txt file inside picasaview.zip and Open readme.txt.
Now, Read the Requirements of this plugin. Which Wordpress Version and PHP Version are required to run this Plugin in Your Wordpress Site.
Then, Follow the the Tips Below.

Start the Tips:

1. First Download "picasaview.zip" Plugin to your Local Computer. (Click Download)

2. Then, Login to your "yourdomain.com/wp-admin" Dashboard.

3. Then, Click on "Plugins" + "Add New" from left sidemenu of Dashboard.

4. Now, Click on "Upload Plugin" button.

5. Now, Browse "picasaview.zip" Downloaded plugin from your computer, Where you downloaded picasaview.zip According to Step – 1 Above then, click on "Install Now"

6. Now, Click on "Active Plugin"

7. Then, See left sidemenu. "PicasaView" folder is added on left sidemenu. Now, Click on "PicasaView" folder.

Noted that: If you do not see "PicasaView" folder on left sidemenu then, see at left sidemenu "Settings" or "Tools".

8. Now you configure yourself oR Watch video tutorial below about PicasaView Configurtions and Settings or How to work "PicasaView" in your WordPress site.

After Activated Plugin According to Step-6 then,

Go to "Plugins" + "Installed Plugin" from Wordpress Admin Panel Leftside Menu.
or Direct go to: https://yourdomain/wp-admin/plugins.php
Then, Find "PicasaView" Activated Plugin from Plugin List.
Then, Click on "Settings" from Plugin that is PicasaView
Now, Edit/Add/Config the setting and Click on "Save Changes" button,

Guide

Guide
Please keep in mind that picasaView requires PHP5 to work. To connect to picasaweb the plugin uses WordPress’ internal connection methods. Please ensure, you’re server is allowed to retrieve data from external URLs. So this is how you install the plugin: Upload the directory ‘picasaview’ and all of its contents to the ‘/wp-content/plugins/’ directory Activate the plugin through the ‘Plugins’ menu in WordPress. Set up your initial connection properties through the admin settings menu. Place `[picasaView]` in you content to view all your public albums. That’s all. If you like to view a specific album, use `[picasaView album='ALBUMNAME']`. Instead of the album name you can also use the unique album id. The album name is the one that you see in the addressbar of your browser when entering your album on picasaweb (may be different from what you entered as album name when creating the album. For example, if it’s `http://picasaweb.google.de/simon.sattes/PicasaViewDemo` then the album name was `PicasaViewDemo`. If your album name contains a single quote use double quotes for the name: `[picasaView album="ALBUMNAME'S"]`. new in v1.0: if you like to show the images of one album directly in a post, use the option “instantView=yes”: e.g. `[picasaView album="ALBUMNAME'S" instantView="yes"]` It’s possible to overwrite all settings on the admin-options page with each picasaView-tag. That gives you the possibility to view all possible albums of different users on your blog. These are the options that can be used in the tag. NOTE: you can combine all options as you like and use as many of them as necessary. If an option is missing, the general setting from the admin options page will be used instead. `album`: the name of the album you’d like to view (please use the shortened part of the album name you can see in the URL on picasaWeb, e.g. “Hamburg2009” as in “http://picasaweb.google.com/USERID/Hamburg2009” `instantview`: if set to “yes”, the album images are shown directly in the post. Can only in combination with `album` `authkey`: authentication key (as specified by picasaweb) for displaying private albums. Works only in combination with `album` `userid`: the user-Id from picasaweb (the part as in “http://picasaweb.google.com/USERID/album…”) `server`: the URL of the picasaView server `thumbnailsize`: the size of the thumbnails. May be one of the following values: `32, 48, 64, 72, 144, 160, 200, 288, 320, 400, 512, 576, 640, 720, 800` `imagesize`: the size of the full images. May be one of the following values: `200, 288, 320, 400, 512, 576, 640, 720, 800, 1024, 1152, 1280, 1440, 1600` (note: 1024 and above will currently not work due to limitations of the picasaweb-service) `imagesperpage`: how many images should be shown at one page. If the album contains more images than this setting, paging is enabled `cropthumbnails`: if set to `yes`, the thumbnails will be cropped, if `no`, they won’t (note: only works with a thumbnail size smaller than 200) `showdebugoutput`: shows more information on what went wrong (if an error occured). A combination could be `[picasaView user="USERNAME" imagesPerPage='6' cropThumbnails='yes']`. The only option that can’t be set this way is `quickPaging` due to technical restrictions.

**Please keep in mind that picasaView requires PHP5 to work. To connect to picasaweb the plugin uses WordPress’ internal connection methods. Please ensure, you’re server is allowed to retrieve data from external URLs. **

So this is how you install the plugin:

Upload the directory ‘picasaview’ and all of its contents to the ‘/wp-content/plugins/’ directory
Activate the plugin through the ‘Plugins’ menu in WordPress.
Set up your initial connection properties through the admin settings menu.
Place [picasaView] in you content to view all your public albums. That’s all.
If you like to view a specific album, use [picasaView album='ALBUMNAME']. Instead of the album name you can also use the unique album id. The album name is the one that you see in the addressbar of your browser when entering your album on picasaweb (may be different from what you entered as album name when creating the album. For example, if it’s http://picasaweb.google.de/simon.sattes/PicasaViewDemo
then the album name was PicasaViewDemo.
If your album name contains a single quote use double quotes for the name: [picasaView album="ALBUMNAME'S"].
new in v1.0: if you like to show the images of one album directly in a post, use the option “instantView=yes”:
e.g. [picasaView album="ALBUMNAME'S" instantView="yes"]

It’s possible to overwrite all settings on the admin-options page with each picasaView-tag. That gives you the possibility to view all possible albums of different users on your blog. These are the options that can be used
in the tag.

NOTE: you can combine all options as you like and use as many of them as necessary. If an option is missing, the general setting from the admin options page will be used instead.

album: the name of the album you’d like to view (please use the shortened part of the album name you can see in the URL on picasaWeb, e.g. “Hamburg2009” as in “http://picasaweb.google.com/USERID/Hamburg2009”
instantview: if set to “yes”, the album images are shown directly in the post. Can only in combination with album
authkey: authentication key (as specified by picasaweb) for displaying private albums. Works only in combination with album
userid: the user-Id from picasaweb (the part as in “http://picasaweb.google.com/USERID/album…”)
server: the URL of the picasaView server
thumbnailsize: the size of the thumbnails. May be one of the following values: 32, 48, 64, 72, 144, 160, 200, 288, 320, 400, 512, 576, 640, 720, 800
imagesize: the size of the full images. May be one of the following values: 200, 288, 320, 400, 512, 576, 640, 720, 800, 1024, 1152, 1280, 1440, 1600 (note: 1024 and above will currently not work due to limitations of the picasaweb-service)
imagesperpage: how many images should be shown at one page. If the album contains more images than this setting, paging is enabled
cropthumbnails: if set to yes, the thumbnails will be cropped, if no, they won’t (note: only works with a thumbnail size smaller than 200)
showdebugoutput: shows more information on what went wrong (if an error occured).

A combination could be [picasaView user="USERNAME" imagesPerPage='6' cropThumbnails='yes'].

The only option that can’t be set this way is quickPaging due to technical restrictions.

your, simply, specifing, content, blog, picasaweb, enables, view, picasaview, albums,

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Reffered: https://wordpress.org/