Yes, if you have Picasa Iphoto you may upload any old pictures and use Picasa Iphoto on your desired picture/pictures.
Before uploading the pictures, one first need to install Picasa Web Albums plugin for iPhoto. The download can be found under Mac Tools section in Google.
Picasa and IPhoto are two different programs. Picasa will work on a Dell, but many Mac users have problems with it. IPhoto will work on a Mac, but many Dell users can't use it.
One can use the Picasa website to upload, organize, decorate, and share pictures with family and friends by using their dedicated software and website.
iPhoto is an application which is used to store and manage all the photos and their metadata in Mac OSX based Computer systems. It uses iPhoto Library where a copy of every single photo is stored. If it corrupts then people face the iPhoto Corruption. To Recover Corrupted pictures and library you need to use professional Photo Recovery Software that work on Mac Platform. One of them is iPhoto Recovery. It is a complete solution for deleted, corrupted and lost iPhoto Pictures.
The pictures are not "in" Picasa as such - they are in folders on the hard drive and Picasa monitors and edits them there. Therefore, to send a picture via email, you would use the email program to locate the photo and attach it to the email. Please note that Picasa does not edit your photos "as you go". Rather it accumulates all the edits for a particular picture and applies them when you Save that picture. This means that if you have not saved the photo after editing, the original (unedited) version will be attached to your email.
Select the pictures (use the shift key and select several pictures together or the command key when selecting pictures not grouped together) that you want to separate from the event. From the Events menu select Split Event to separate the selected pictures.
Yes, you can use iPhoto slideshows in iMovie by exporting the slideshow as a video file from iPhoto and then importing that video into iMovie. Simply create your slideshow in iPhoto, export it to your desired format, and then open iMovie to add the exported slideshow to your project. This allows you to incorporate your iPhoto slideshows into your iMovie edits seamlessly.
Paint Shop Pro, Picasa and Photoshop all have options to reduce file size. To compress the files themselves, use WinRAR or WinZip.
Picasa is an app you can download for free. It is 'easy to use' and you can use it to organize, edit, and share your photos. If you like to share your photos it would be helpful.
iPhoto is no longer available for download as it has been discontinued by Apple. However, you can use the Photos app that comes pre-installed on macOS devices as the replacement for iPhoto.
Picasa is for art. If you are interested in art then it would most likely be of good use to you but for others who wont get a lot of use out of it i wouldnt recommend it.
For example to upload to Google Picasa you can either use Google Picasa or other tools supporting it (like AZImage).