diff --git a/plate-tool-lib/src/transfer_region.rs b/plate-tool-lib/src/transfer_region.rs
index 587d319..ca99f5a 100644
--- a/plate-tool-lib/src/transfer_region.rs
+++ b/plate-tool-lib/src/transfer_region.rs
@@ -1,9 +1,16 @@
 use serde::{Deserialize, Serialize};
 
+use regex::Regex;
+
 use super::plate::Plate;
+use crate::plate::PlateType;
+use crate::util;
 use crate::Well;
 
-#[derive(Clone, PartialEq, Eq, Serialize, Deserialize, Debug)]
+use std::fmt;
+use std::sync::LazyLock;
+
+#[derive(Clone, PartialEq, Eq, Serialize, Deserialize, Debug, Hash)]
 pub struct CustomRegion {
     src: Vec<Well>,
     dest: Vec<Well>,
@@ -15,7 +22,7 @@ impl CustomRegion {
     }
 }
 
-#[derive(Clone, PartialEq, Eq, Serialize, Deserialize, Debug)]
+#[derive(Clone, PartialEq, Eq, Serialize, Deserialize, Debug, Hash)]
 pub enum Region {
     Rect(Well, Well),
     Point(Well),
@@ -26,6 +33,28 @@ impl Default for Region {
         Region::Point(Well { row: 1, col: 1 })
     }
 }
+impl Display for Region {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Region::Rect(ul, br) => {
+                write!(
+                    f,
+                    "{}{}:{}{}",
+                    util::num_to_letters(ul.col).unwrap(),
+                    ul.row,
+                    util::num_to_letters(br.col).unwrap(),
+                    br.row
+                )
+            }
+            Region::Point(w) => {
+                write!(f, "{}{}", util::num_to_letters(w.col).unwrap(), w.row)
+            }
+            Region::Custom(..) => {
+                write!(f, "Custom Region")
+            }
+        }
+    }
+}
 impl TryFrom<Region> for (Well, Well) {
     type Error = &'static str;
     fn try_from(region: Region) -> Result<Self, Self::Error> {
@@ -53,9 +82,76 @@ impl Region {
             dest: dest_pts,
         })
     }
+
+    pub fn new_from_wells(w1: Well, w2: Option<Well>) -> Self {
+        if w2.is_none() {
+            Self::Point(w1)
+        } else {
+            let w2 = w2.unwrap();
+            let (w1, w2) = standardize_rectangle(&w1, &w2);
+            Self::Rect(w1, w2)
+        }
+    }
+
+    pub fn try_parse_str(input: &str) -> Option<Self> {
+        static POINT_REGEX: LazyLock<Regex> =
+            LazyLock::new(|| Regex::new(r"([A-Z,a-z]+)(\d+)").unwrap());
+        static RECT_REGEX: LazyLock<Regex> =
+            LazyLock::new(|| Regex::new(r"([A-Z,a-z]+)(\d+):([A-Z,a-z]+)(\d+)").unwrap());
+
+        log::info!("{:?}", input);
+        if let Some(captures) = RECT_REGEX.captures(input) {
+            if let (Some(row1), Some(col1), Some(row2), Some(col2)) = (
+                crate::util::letters_to_num(&captures[1]),
+                captures[2].parse::<u8>().ok(),
+                crate::util::letters_to_num(&captures[3]),
+                captures[4].parse::<u8>().ok(),
+            ) {
+                return Some(Region::Rect(
+                    Well {
+                        row: row1,
+                        col: col1,
+                    },
+                    Well {
+                        row: row2,
+                        col: col2,
+                    },
+                ));
+            } else {
+                return None;
+            }
+        } else if let Some(captures) = POINT_REGEX.captures(input) {
+            if let (Some(row), Some(col)) = (
+                crate::util::letters_to_num(&captures[1]),
+                captures[2].parse::<u8>().ok(),
+            ) {
+                return Some(Region::Point(Well { row, col }));
+            } else {
+                return None;
+            }
+        } else {
+            None
+        }
+    }
+
+    pub fn contains_well(&self, w: &Well, pt: Option<PlateType>) -> bool {
+        match self {
+            Self::Point(x) => x == w,
+            Self::Rect(ul, br) => {
+                w.row <= br.row && w.row >= ul.row && w.col <= br.col && w.col >= ul.col
+            }
+            Self::Custom(xs) => match pt {
+                Some(PlateType::Source) => xs.src.contains(w),
+                Some(PlateType::Destination) => xs.dest.contains(w),
+                None => {
+                    unreachable!("Cannot check if custom contains well without knowing the type")
+                }
+            },
+        }
+    }
 }
 
-#[derive(PartialEq, Eq, Clone, Serialize, Deserialize, Debug)]
+#[derive(PartialEq, Eq, Clone, Serialize, Deserialize, Debug, Hash)]
 pub struct TransferRegion {
     pub source_plate: Plate,
     pub source_region: Region, // Even if it is just a point, we don't want corners.
@@ -233,8 +329,10 @@ impl TransferRegion {
                         let j = j
                             .saturating_sub(s_ul.col)
                             .saturating_div(il_source.1.unsigned_abs());
-                        let checked_il_dest = (u8::max(il_dest.0.unsigned_abs(), 1u8),
-                                                u8::max(il_dest.1.unsigned_abs(), 1u8));
+                        let checked_il_dest = (
+                            u8::max(il_dest.0.unsigned_abs(), 1u8),
+                            u8::max(il_dest.1.unsigned_abs(), 1u8),
+                        );
                         let row_modulus = number_used_src_wells.0 * checked_il_dest.0;
                         let column_modulus = number_used_src_wells.1 * checked_il_dest.1;
 
@@ -256,12 +354,12 @@ impl TransferRegion {
                                 .filter(|Well { row: x, col: y }| {
                                     // How many times have we replicated? < How many are we allowed
                                     // to replicate?
-                                    x.checked_sub(d_ul.row).unwrap().div_euclid(
-                                        row_modulus
-                                    ) < count.0
-                                        && y.checked_sub(d_ul.col).unwrap().div_euclid(
-                                            column_modulus
-                                        ) < count.1
+                                    x.checked_sub(d_ul.row).unwrap().div_euclid(row_modulus)
+                                        < count.0
+                                        && y.checked_sub(d_ul.col)
+                                            .unwrap()
+                                            .div_euclid(column_modulus)
+                                            < count.1
                                 })
                                 .collect(),
                         )
@@ -319,8 +417,8 @@ impl TransferRegion {
                     return Err("Source region is out-of-bounds! (Too wide)");
                 }
 
-                if il_dest == (0,0) {
-                    return Err("Refusing to pool both dimensions in a rectangular transfer!\nPlease select a point in the destination plate.")
+                if il_dest == (0, 0) {
+                    return Err("Refusing to pool both dimensions in a rectangular transfer!\nPlease select a point in the destination plate.");
                 }
             }
             Region::Custom(_) => return Ok(()),
@@ -372,7 +470,7 @@ fn standardize_rectangle(c1: &Well, c2: &Well) -> (Well, Well) {
 
 #[cfg(debug_assertions)]
 use std::fmt;
-use std::ops::Mul;
+use std::{fmt::Display, ops::Mul};
 
 #[cfg(debug_assertions)] // There should be no reason to print a transfer otherwise
 impl fmt::Display for TransferRegion {