I created free space and I don’t know to recover it

Preparation:

• Backup 'Macintosh HD'
• Start another computer or smartphone and access this page here to follow the instructions.
• Detach any external drive (especially an external Time Machine backup drive)

• Restart to Internet Recovery Mode by pressing alt cmd R at startup.
  The prerequisites are the latest firmware update installed, either ethernet or WLAN (WPA/WPA2) and a router with DHCP activated.
  On a 50 Mbps-line it takes about 4 min (presenting a small animated globe) to boot into a recovery netboot image which usually is loaded from an apple/akamai server.

  I recommend ethernet because it's more reliable. If you are restricted to WIFI and the boot process fails, just restart your Mac until you succeed booting.

  Alternatively you may start from a bootable installer thumb drive (Mavericks or Yosemite) or a thumb drive containing a full system (Mavericks or Yosemite).

Revert CoreStorage Volume

• Check the volume 'Macintosh HD' with Disk Utility and repair it if necessary. If the volume is corrupted beyond any repair consider a reinstall of Mac OS X.
• If the volume is OK quit Disk Utility

• Open Terminal from the menubar (Utilities/Terminal) and enter diskutil cs list. The output will be this:

  CoreStorage logical volume groups (1 found)
  |
  +-- Logical Volume Group 25AF6969-0B3A-4C2C-BE38-29864C233F66
      =========================================================
      Name:         Macintosh HD
      Status:       Online
      Size:         801345126400 B (801.3 GB)
      Free Space:   18907136 B (18.9 MB)
      |
      +-< Physical Volume 21095CB1-4D76-44F5-B438-0B84A06AB0E8
      |   ----------------------------------------------------
      |   Index:    0
      |   Disk:     disk0s2
      |   Status:   Online
      |   Size:     801345126400 B (801.3 GB)
      |
      +-> Logical Volume Family 2DDF1B89-E73A-45E7-96CD-5FA1DC9CA275
          ----------------------------------------------------------
          Encryption Status:       Unlocked
          Encryption Type:         None
          Conversion Status:       NoConversion
          Conversion Direction:    -none-
          Has Encrypted Extents:   No
          Fully Secure:            No
          Passphrase Required:     No
          |
          +-> Logical Volume 54E92188-CDD5-44AE-9D58-EF6A5B69D707
              ---------------------------------------------------
              Disk:                  disk1
              Status:                Online
              Size (Total):          800973897728 B (801.0 GB)
              Conversion Progress:   -none-
              Revertible:            Yes (no decryption required)
              LV Name:               Macintosh HD
              Volume Name:           Macintosh HD
              Content Hint:          Apple_HFS
  

• Copy the UUID of the Logical Volume (lvUUID). It's the fourth listed.
• Your Logical Volume is revertible, so enter:
  diskutil coreStorage revert lvUUID to revert your CoreStorage Volume to a standard volume. In your case this is:
  diskutil coreStorage revert 54E92188-CDD5-44AE-9D58-EF6A5B69D707
  This will take a few seconds.
• After a successfull conversion enter 'exit' and quit Terminal.
• Open 'Disk Utility', hightlight the volume 'Macintosh HD' and check it for errors
• Highlight the HDD and expand the volume 'Macintosh HD' to the full possible size (~1 TB)
• Quit 'Disk Utility' and reboot to your standard boot volume ('Macintosh HD')

diskutil cs revert turns off the Core Storage volume manager for that volume. The Yosemite installer turns it on in case it's needed later (mostly for FileVault), but if you don't actually need it (e.g. for FileVault a Fusion disk) it doesn't do anything useful.

If you aren't using FileVault or a Fusion disk, what Core Storage mostly does is confuse Disk Utility, limiting its ability to dynamically resize and rearrange volumes, and preventing it from displaying the disk structure properly. That "251 GB APPLE SSD SD..." thing is what Disk Utility should be displaying there, because "Macintosh HD" and "BOOTCAMP" are both volumes within the physical SSD. With Core Storage, it was showing BOOTCAMP as somehow part of Macintosh HD, which it isn't at all.